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Implement thread-safe uart

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This commit is contained in:
me-no-dev 2016-10-14 03:07:21 +03:00
parent 17c8ceb1b9
commit 242bca9451
1 changed files with 40 additions and 4 deletions
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42
cores/esp32/esp32-hal-uart.c
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@ -40,14 +40,21 @@ static int s_uart_debug_nr = 0;
struct uart_struct_t {
uart_dev_t * dev;
xSemaphoreHandle lock;
uint8_t num;
xQueueHandle queue;
};
#define UART_MUTEX_LOCK() do {} while (xSemaphoreTake(uart->lock, portMAX_DELAY) != pdPASS)
#define UART_MUTEX_UNLOCK() xSemaphoreGive(uart->lock)
#define UART_MUTEX_LOCK_NUM(i) if(_uart_bus_array[i].lock != NULL) do {} while (xSemaphoreTake(_uart_bus_array[i].lock, portMAX_DELAY) != pdPASS)
#define UART_MUTEX_UNLOCK_NUM(i) if(_uart_bus_array[i].lock != NULL) xSemaphoreGive(_uart_bus_array[i].lock)
static uart_t _uart_bus_array[3] = {
{(volatile uart_dev_t *)(DR_REG_UART_BASE), 0, NULL},
{(volatile uart_dev_t *)(DR_REG_UART1_BASE), 1, NULL},
{(volatile uart_dev_t *)(DR_REG_UART2_BASE), 2, NULL}
{(volatile uart_dev_t *)(DR_REG_UART_BASE), NULL, 0, NULL},
{(volatile uart_dev_t *)(DR_REG_UART1_BASE), NULL, 1, NULL},
{(volatile uart_dev_t *)(DR_REG_UART2_BASE), NULL, 2, NULL}
};
static void IRAM_ATTR _uart_isr(void *arg)
@ -88,6 +95,7 @@ void uartDisableGlobalInterrupt()
void uartEnableInterrupt(uart_t* uart)
{
UART_MUTEX_LOCK();
uart->dev->conf1.rxfifo_full_thrhd = 112;
uart->dev->conf1.rx_tout_thrhd = 2;
uart->dev->conf1.rx_tout_en = 1;
@ -97,13 +105,16 @@ void uartEnableInterrupt(uart_t* uart)
uart->dev->int_clr.val = 0xffffffff;
intr_matrix_set(xPortGetCoreID(), UART_INTR_SOURCE(uart->num), ETS_UART_INUM);
UART_MUTEX_UNLOCK();
}
void uartDisableInterrupt(uart_t* uart)
{
UART_MUTEX_LOCK();
uart->dev->conf1.val = 0;
uart->dev->int_ena.val = 0;
uart->dev->int_clr.val = 0xffffffff;
UART_MUTEX_UNLOCK();
}
void uartDetachRx(uart_t* uart)
@ -155,6 +166,13 @@ uart_t* uartBegin(uint8_t uart_nr, uint32_t baudrate, uint32_t config, int8_t rx
uart_t* uart = &_uart_bus_array[uart_nr];
if(uart->lock == NULL) {
uart->lock = xSemaphoreCreateMutex();
if(uart->lock == NULL) {
return NULL;
}
}
if(queueLen && uart->queue == NULL) {
uart->queue = xQueueCreate(queueLen, sizeof(uint8_t)); //initialize the queue
if(uart->queue == NULL) {
@ -164,7 +182,9 @@ uart_t* uartBegin(uint8_t uart_nr, uint32_t baudrate, uint32_t config, int8_t rx
uartFlush(uart);
uartSetBaudRate(uart, baudrate);
UART_MUTEX_LOCK();
uart->dev->conf0.val = config;
UART_MUTEX_UNLOCK();
if(rxPin != -1) {
uartAttachRx(uart, rxPin, inverted);
@ -183,6 +203,7 @@ void uartEnd(uart_t* uart)
return;
}
UART_MUTEX_LOCK();
if(uart->queue != NULL) {
vQueueDelete(uart->queue);
}
@ -191,6 +212,7 @@ void uartEnd(uart_t* uart)
uartDetachTx(uart);
uart->dev->conf0.val = 0;
UART_MUTEX_UNLOCK();
}
uint32_t uartAvailable(uart_t* uart)
@ -230,8 +252,10 @@ void uartWrite(uart_t* uart, uint8_t c)
if(uart == NULL) {
return;
}
UART_MUTEX_LOCK();
while(uart->dev->status.rxfifo_cnt == 0x7F);
uart->dev->fifo.rw_byte = c;
UART_MUTEX_UNLOCK();
}
void uartWriteBuf(uart_t* uart, const uint8_t * data, size_t len)
@ -239,12 +263,14 @@ void uartWriteBuf(uart_t* uart, const uint8_t * data, size_t len)
if(uart == NULL) {
return;
}
UART_MUTEX_LOCK();
while(len) {
while(len && uart->dev->status.rxfifo_cnt < 0x7F) {
uart->dev->fifo.rw_byte = *data++;
len--;
}
}
UART_MUTEX_UNLOCK();
}
void uartFlush(uart_t* uart)
@ -253,6 +279,7 @@ void uartFlush(uart_t* uart)
return;
}
UART_MUTEX_LOCK();
while(uart->dev->status.txfifo_cnt);
uart->dev->conf0.txfifo_rst = 1;
@ -260,6 +287,7 @@ void uartFlush(uart_t* uart)
uart->dev->conf0.rxfifo_rst = 1;
uart->dev->conf0.rxfifo_rst = 0;
UART_MUTEX_UNLOCK();
}
void uartSetBaudRate(uart_t* uart, uint32_t baud_rate)
@ -267,9 +295,11 @@ void uartSetBaudRate(uart_t* uart, uint32_t baud_rate)
if(uart == NULL) {
return;
}
UART_MUTEX_LOCK();
uint32_t clk_div = ((UART_CLK_FREQ<<4)/baud_rate);
uart->dev->clk_div.div_int = clk_div>>4 ;
uart->dev->clk_div.div_frag = clk_div & 0xf;
UART_MUTEX_UNLOCK();
}
uint32_t uartGetBaudRate(uart_t* uart)
@ -283,20 +313,26 @@ uint32_t uartGetBaudRate(uart_t* uart)
static void IRAM_ATTR uart0_write_char(char c)
{
UART_MUTEX_LOCK_NUM(0);
while(((ESP_REG(0x01C+DR_REG_UART_BASE) >> UART_TXFIFO_CNT_S) & 0x7F) == 0x7F);
ESP_REG(DR_REG_UART_BASE) = c;
UART_MUTEX_UNLOCK_NUM(0);
}
static void IRAM_ATTR uart1_write_char(char c)
{
UART_MUTEX_LOCK_NUM(1);
while(((ESP_REG(0x01C+DR_REG_UART1_BASE) >> UART_TXFIFO_CNT_S) & 0x7F) == 0x7F);
ESP_REG(DR_REG_UART1_BASE) = c;
UART_MUTEX_UNLOCK_NUM(1);
}
static void IRAM_ATTR uart2_write_char(char c)
{
UART_MUTEX_LOCK_NUM(2);
while(((ESP_REG(0x01C+DR_REG_UART2_BASE) >> UART_TXFIFO_CNT_S) & 0x7F) == 0x7F);
ESP_REG(DR_REG_UART2_BASE) = c;
UART_MUTEX_UNLOCK_NUM(2);
}
void uartSetDebug(uart_t* uart)