df6567e634
Pretty much everyone needs to include map.h, since it's such an integral part of the Micro Python object implementation. Thus, the definitions are now in obj.h instead. map.h is removed.
270 lines
8.1 KiB
C
270 lines
8.1 KiB
C
#include <stdio.h>
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#include <stm32f4xx_rcc.h>
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#include <stm32f4xx_gpio.h>
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#include <stm32f4xx_usart.h>
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#include "misc.h"
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#include "mpconfig.h"
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#include "qstr.h"
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#include "obj.h"
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#include "usart.h"
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pyb_usart_t pyb_usart_global_debug = PYB_USART_NONE;
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static USART_TypeDef *usart_get_base(pyb_usart_t usart_id) {
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USART_TypeDef *USARTx=NULL;
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switch (usart_id) {
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case PYB_USART_NONE:
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break;
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case PYB_USART_1:
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USARTx = USART1;
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break;
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case PYB_USART_2:
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USARTx = USART2;
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break;
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case PYB_USART_3:
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USARTx = USART3;
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break;
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case PYB_USART_6:
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USARTx = USART6;
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break;
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}
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return USARTx;
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}
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void usart_init(pyb_usart_t usart_id, uint32_t baudrate) {
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USART_TypeDef *USARTx=NULL;
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uint32_t GPIO_Pin=0;
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uint8_t GPIO_AF_USARTx=0;
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GPIO_TypeDef* GPIO_Port=NULL;
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uint16_t GPIO_PinSource_TX=0;
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uint16_t GPIO_PinSource_RX=0;
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uint32_t RCC_APBxPeriph=0;
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void (*RCC_APBxPeriphClockCmd)(uint32_t, FunctionalState)=NULL;
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switch (usart_id) {
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case PYB_USART_NONE:
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return;
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case PYB_USART_1:
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USARTx = USART1;
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GPIO_Port = GPIOA;
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GPIO_AF_USARTx = GPIO_AF_USART1;
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GPIO_Pin = GPIO_Pin_9 | GPIO_Pin_10;
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GPIO_PinSource_TX = GPIO_PinSource9;
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GPIO_PinSource_RX = GPIO_PinSource10;
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RCC_APBxPeriph = RCC_APB2Periph_USART1;
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RCC_APBxPeriphClockCmd =RCC_APB2PeriphClockCmd;
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break;
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case PYB_USART_2:
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USARTx = USART2;
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GPIO_Port = GPIOD;
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GPIO_AF_USARTx = GPIO_AF_USART2;
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GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_6;
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GPIO_PinSource_TX = GPIO_PinSource5;
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GPIO_PinSource_RX = GPIO_PinSource6;
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RCC_APBxPeriph = RCC_APB1Periph_USART2;
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RCC_APBxPeriphClockCmd =RCC_APB1PeriphClockCmd;
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break;
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case PYB_USART_3:
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USARTx = USART3;
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#if defined(PYBOARD3) || defined(PYBOARD4)
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GPIO_Port = GPIOB;
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GPIO_AF_USARTx = GPIO_AF_USART3;
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GPIO_Pin = GPIO_Pin_10 | GPIO_Pin_11;
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GPIO_PinSource_TX = GPIO_PinSource10;
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GPIO_PinSource_RX = GPIO_PinSource11;
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#else
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GPIO_Port = GPIOD;
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GPIO_AF_USARTx = GPIO_AF_USART3;
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GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_9;
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GPIO_PinSource_TX = GPIO_PinSource8;
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GPIO_PinSource_RX = GPIO_PinSource9;
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#endif
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RCC_APBxPeriph = RCC_APB1Periph_USART3;
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RCC_APBxPeriphClockCmd =RCC_APB1PeriphClockCmd;
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break;
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case PYB_USART_6:
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USARTx = USART6;
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GPIO_Port = GPIOC;
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GPIO_AF_USARTx = GPIO_AF_USART6;
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GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7;
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GPIO_PinSource_TX = GPIO_PinSource6;
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GPIO_PinSource_RX = GPIO_PinSource7;
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RCC_APBxPeriph = RCC_APB2Periph_USART6;
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RCC_APBxPeriphClockCmd =RCC_APB2PeriphClockCmd;
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break;
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}
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/* Initialize USARTx */
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RCC_APBxPeriphClockCmd(RCC_APBxPeriph, ENABLE);
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GPIO_PinAFConfig(GPIO_Port, GPIO_PinSource_TX, GPIO_AF_USARTx);
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GPIO_PinAFConfig(GPIO_Port, GPIO_PinSource_RX, GPIO_AF_USARTx);
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GPIO_InitTypeDef GPIO_InitStructure;
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin;
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_25MHz;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
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GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
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GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
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GPIO_Init(GPIO_Port, &GPIO_InitStructure);
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USART_InitTypeDef USART_InitStructure;
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USART_InitStructure.USART_BaudRate = baudrate;
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USART_InitStructure.USART_WordLength = USART_WordLength_8b;
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USART_InitStructure.USART_StopBits = USART_StopBits_1;
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USART_InitStructure.USART_Parity = USART_Parity_No;
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USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
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USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
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USART_Init(USARTx, &USART_InitStructure);
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USART_Cmd(USARTx, ENABLE);
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}
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bool usart_rx_any(pyb_usart_t usart_id) {
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USART_TypeDef *USARTx = usart_get_base(usart_id);
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return USART_GetFlagStatus(USARTx, USART_FLAG_RXNE) == SET;
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}
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int usart_rx_char(pyb_usart_t usart_id) {
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USART_TypeDef *USARTx = usart_get_base(usart_id);
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return USART_ReceiveData(USARTx);
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}
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void usart_tx_char(pyb_usart_t usart_id, int c) {
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USART_TypeDef *USARTx = usart_get_base(usart_id);
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// wait until the end of any previous transmission
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uint32_t timeout = 100000;
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while (USART_GetFlagStatus(USARTx, USART_FLAG_TC) == RESET && --timeout > 0) {
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}
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USART_SendData(USARTx, c);
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}
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void usart_tx_str(pyb_usart_t usart_id, const char *str) {
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for (; *str; str++) {
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usart_tx_char(usart_id, *str);
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}
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}
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void usart_tx_bytes(pyb_usart_t usart_id, const char *data, uint len) {
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for (; len > 0; data++, len--) {
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usart_tx_char(usart_id, *data);
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}
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}
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void usart_tx_strn_cooked(pyb_usart_t usart_id, const char *str, int len) {
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for (const char *top = str + len; str < top; str++) {
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if (*str == '\n') {
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usart_tx_char(usart_id, '\r');
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}
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usart_tx_char(usart_id, *str);
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}
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}
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/******************************************************************************/
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/* Micro Python bindings */
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typedef struct _pyb_usart_obj_t {
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mp_obj_base_t base;
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pyb_usart_t usart_id;
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bool is_enabled;
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} pyb_usart_obj_t;
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static mp_obj_t usart_obj_status(mp_obj_t self_in) {
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pyb_usart_obj_t *self = self_in;
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if (usart_rx_any(self->usart_id)) {
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return mp_const_true;
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} else {
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return mp_const_false;
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}
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}
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static mp_obj_t usart_obj_rx_char(mp_obj_t self_in) {
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mp_obj_t ret = mp_const_none;
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pyb_usart_obj_t *self = self_in;
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if (self->is_enabled) {
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ret = mp_obj_new_int(usart_rx_char(self->usart_id));
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}
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return ret;
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}
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static mp_obj_t usart_obj_tx_char(mp_obj_t self_in, mp_obj_t c) {
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pyb_usart_obj_t *self = self_in;
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uint len;
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const char *str = mp_obj_str_get_data(c, &len);
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if (len == 1 && self->is_enabled) {
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usart_tx_char(self->usart_id, str[0]);
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}
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return mp_const_none;
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}
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static mp_obj_t usart_obj_tx_str(mp_obj_t self_in, mp_obj_t s) {
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pyb_usart_obj_t *self = self_in;
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if (self->is_enabled) {
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if (MP_OBJ_IS_STR(s)) {
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uint len;
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const char *data = mp_obj_str_get_data(s, &len);
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usart_tx_bytes(self->usart_id, data, len);
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}
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}
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return mp_const_none;
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}
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static void usart_obj_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t self_in, mp_print_kind_t kind) {
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pyb_usart_obj_t *self = self_in;
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print(env, "<Usart %lu>", self->usart_id);
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}
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static MP_DEFINE_CONST_FUN_OBJ_1(usart_obj_status_obj, usart_obj_status);
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static MP_DEFINE_CONST_FUN_OBJ_1(usart_obj_rx_char_obj, usart_obj_rx_char);
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static MP_DEFINE_CONST_FUN_OBJ_2(usart_obj_tx_char_obj, usart_obj_tx_char);
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static MP_DEFINE_CONST_FUN_OBJ_2(usart_obj_tx_str_obj, usart_obj_tx_str);
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STATIC const mp_map_elem_t usart_locals_dict_table[] = {
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{ MP_OBJ_NEW_QSTR(MP_QSTR_status), (mp_obj_t)&usart_obj_status_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_recv_chr), (mp_obj_t)&usart_obj_rx_char_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_send_chr), (mp_obj_t)&usart_obj_tx_char_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_send), (mp_obj_t)&usart_obj_tx_str_obj },
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};
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STATIC MP_DEFINE_CONST_DICT(usart_locals_dict, usart_locals_dict_table);
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STATIC const mp_obj_type_t usart_obj_type = {
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{ &mp_type_type },
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.name = MP_QSTR_Usart,
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.print = usart_obj_print,
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.locals_dict = (mp_obj_t)&usart_locals_dict,
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};
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STATIC mp_obj_t pyb_Usart(mp_obj_t usart_id, mp_obj_t baudrate) {
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if (mp_obj_get_int(usart_id)>PYB_USART_MAX) {
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return mp_const_none;
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}
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/* init USART */
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usart_init(mp_obj_get_int(usart_id), mp_obj_get_int(baudrate));
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pyb_usart_obj_t *o = m_new_obj(pyb_usart_obj_t);
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o->base.type = &usart_obj_type;
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o->usart_id = mp_obj_get_int(usart_id);
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o->is_enabled = true;
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return o;
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}
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MP_DEFINE_CONST_FUN_OBJ_2(pyb_Usart_obj, pyb_Usart);
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