mirror of
https://github.com/RIOT-OS/RIOT.git
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147 lines
4.1 KiB
Diff
147 lines
4.1 KiB
Diff
*** stock_iot-lab_M3/openwsn/uart_ow.c Thu Apr 24 11:19:40 2014
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--- riot-openwsn-wip/openwsn/uart_ow.c Thu Apr 24 16:55:54 2014
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***************
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*** 0 ****
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--- 1,141 ----
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+ /**
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+ \brief iot-lab_M3 definition of the "uart" bsp module (based on openmoteSTM32 code).
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+
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+ \author Chang Tengfei <tengfei.chang@gmail.com>, July 2012.
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+ \author Alaeddine Weslati <alaeddine.weslati@inria.fr>, January 2014.
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+ */
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+
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+ #include "stm32f10x_lib.h"
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+ #include "stdio.h"
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+ #include "stdint.h"
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+ #include "string.h"
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+ #include "uart_ow.h"
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+ #include "leds_ow.h"
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+
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+ #include "rcc.h"
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+ #include "nvic.h"
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+
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+ //=========================== defines =========================================
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+
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+ //=========================== variables =======================================
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+
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+ typedef struct {
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+ uart_tx_cbt txCb;
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+ uart_rx_cbt rxCb;
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+ uint8_t startOrend;
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+ uint8_t flagByte;
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+ } uart_vars_t;
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+
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+ volatile uart_vars_t uart_vars;
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+
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+ //=========================== prototypes ======================================
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+
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+ //=========================== public ==========================================
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+
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+ void uart_init_ow(void)
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+ {
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+ // reset local variables
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+ memset((void*)&uart_vars,0,sizeof(uart_vars_t));
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+
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+ //when this value is 0, we are send the first data
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+ uart_vars.startOrend = 0;
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+ //flag byte for start byte and end byte
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+ uart_vars.flagByte = 0x7E;
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+
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+ GPIO_InitTypeDef GPIO_InitStructure;
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+ USART_InitTypeDef USART_InitStructure;
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+
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+ /* Enable GPIO clock */
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+ RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO, ENABLE);
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+
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+ RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
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+
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+ /* Configure USART Tx as alternate function push-pull */
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+ GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
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+ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
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+ GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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+ GPIO_Init(GPIOA, &GPIO_InitStructure);
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+
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+ /* Configure USART Rx as input floating */
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+ GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
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+ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
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+ GPIO_Init(GPIOA, &GPIO_InitStructure);
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+
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+ USART_InitStructure.USART_BaudRate = 115200;
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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(USART1, &USART_InitStructure);
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+
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+ USART_Cmd(USART1, ENABLE); // enable USART1
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+ }
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+
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+ void uart_setCallbacks(uart_tx_cbt txCb, uart_rx_cbt rxCb)
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+ {
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+ uart_vars.txCb = txCb;
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+ uart_vars.rxCb = rxCb;
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+
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+ //enable nvic uart.
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+ NVIC_uart();
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+ }
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+
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+ void uart_enableInterrupts(void)
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+ {
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+ USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
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+ }
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+
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+ void uart_disableInterrupts(void)
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+ {
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+ USART_ITConfig(USART1, USART_IT_TXE, DISABLE);
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+ USART_ITConfig(USART1, USART_IT_RXNE, DISABLE);
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+ }
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+
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+ void uart_clearRxInterrupts(void)
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+ {
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+ USART_ClearFlag(USART1, USART_FLAG_RXNE);
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+ }
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+
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+ void uart_clearTxInterrupts(void)
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+ {
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+ USART_ClearFlag(USART1, USART_FLAG_TXE);
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+ }
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+
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+ void uart_writeByte(uint8_t byteToWrite)
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+ {
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+ USART_SendData(USART1, byteToWrite);
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+ while(USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET);
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+
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+ //start or end byte?
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+ if(byteToWrite == uart_vars.flagByte) {
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+ uart_vars.startOrend = (uart_vars.startOrend == 0)?1:0;
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+ //start byte
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+ if(uart_vars.startOrend == 1) {
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+ USART_ITConfig(USART1, USART_IT_TXE, ENABLE);
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+ } else {
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+ USART_ITConfig(USART1, USART_IT_TXE, DISABLE);
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+ }
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+ }
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+ }
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+
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+ uint8_t uart_readByte(void)
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+ {
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+ uint16_t temp;
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+ temp = USART_ReceiveData(USART1);
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+ return (uint8_t)temp;
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+ }
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+
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+ //=========================== interrupt handlers ==============================
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+
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+ kick_scheduler_t uart_tx_isr(void)
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+ {
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+ uart_vars.txCb();
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+ return DO_NOT_KICK_SCHEDULER;
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+ }
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+
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+ kick_scheduler_t uart_rx_isr(void)
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+ {
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+ uart_vars.rxCb();
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+ return DO_NOT_KICK_SCHEDULER;
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+ }
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