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uart: add option to put ISR in IRAM

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This commit is contained in:
suda-morris 2019-08-26 17:14:15 +08:00 committed by bot
parent adbf0bff53
commit f94711c316
2 changed files with 32 additions and 8 deletions
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11
components/driver/Kconfig
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@ -71,4 +71,15 @@ menu "Driver configurations"
endmenu # SPI Configuration
menu "UART configuration"
config UART_ISR_IN_IRAM
bool "Place UART ISR function into IRAM"
default n
help
If this option is not selected, UART interrupt will be disabled for a long time and
may cause data lost when doing spi flash operation.
endmenu # UART Configuration
endmenu # Driver configurations

29
components/driver/uart.c
View file

@ -28,6 +28,13 @@
#include "driver/uart.h"
#include "driver/gpio.h"
#include "driver/uart_select.h"
#include "sdkconfig.h"
#ifdef CONFIG_UART_ISR_IN_IRAM
#define UART_ISR_ATTR IRAM_ATTR
#else
#define UART_ISR_ATTR
#endif
#define UART_NUM SOC_UART_NUM
@ -305,7 +312,7 @@ esp_err_t uart_get_hw_flow_ctrl(uart_port_t uart_num, uart_hw_flowcontrol_t* flo
return ESP_OK;
}
static esp_err_t uart_reset_rx_fifo(uart_port_t uart_num)
static esp_err_t UART_ISR_ATTR uart_reset_rx_fifo(uart_port_t uart_num)
{
UART_CHECK((uart_num < UART_NUM_MAX), "uart_num error", ESP_FAIL);
//Due to hardware issue, we can not use fifo_rst to reset uart fifo.
@ -318,7 +325,7 @@ static esp_err_t uart_reset_rx_fifo(uart_port_t uart_num)
return ESP_OK;
}
esp_err_t uart_clear_intr_status(uart_port_t uart_num, uint32_t clr_mask)
esp_err_t UART_ISR_ATTR uart_clear_intr_status(uart_port_t uart_num, uint32_t clr_mask)
{
UART_CHECK((uart_num < UART_NUM_MAX), "uart_num error", ESP_FAIL);
//intr_clr register is write-only
@ -345,14 +352,14 @@ esp_err_t uart_disable_intr_mask(uart_port_t uart_num, uint32_t disable_mask)
return ESP_OK;
}
static void uart_disable_intr_mask_from_isr(uart_port_t uart_num, uint32_t disable_mask)
static void UART_ISR_ATTR uart_disable_intr_mask_from_isr(uart_port_t uart_num, uint32_t disable_mask)
{
UART_ENTER_CRITICAL_ISR(&uart_spinlock[uart_num]);
CLEAR_PERI_REG_MASK(UART_INT_ENA_REG(uart_num), disable_mask);
UART_EXIT_CRITICAL_ISR(&uart_spinlock[uart_num]);
}
static void uart_enable_intr_mask_from_isr(uart_port_t uart_num, uint32_t enable_mask)
static void UART_ISR_ATTR uart_enable_intr_mask_from_isr(uart_port_t uart_num, uint32_t enable_mask)
{
UART_ENTER_CRITICAL_ISR(&uart_spinlock[uart_num]);
SET_PERI_REG_MASK(UART_INT_CLR_REG(uart_num), enable_mask);
@ -375,7 +382,7 @@ static esp_err_t uart_pattern_link_free(uart_port_t uart_num)
return ESP_OK;
}
static esp_err_t uart_pattern_enqueue(uart_port_t uart_num, int pos)
static esp_err_t UART_ISR_ATTR uart_pattern_enqueue(uart_port_t uart_num, int pos)
{
UART_CHECK((p_uart_obj[uart_num]), "uart driver error", ESP_FAIL);
esp_err_t ret = ESP_OK;
@ -743,7 +750,7 @@ esp_err_t uart_intr_config(uart_port_t uart_num, const uart_intr_config_t *intr_
return ESP_OK;
}
static int uart_find_pattern_from_last(uint8_t* buf, int length, uint8_t pat_chr, int pat_num)
static int UART_ISR_ATTR uart_find_pattern_from_last(uint8_t* buf, int length, uint8_t pat_chr, int pat_num)
{
int cnt = 0;
int len = length;
@ -762,7 +769,7 @@ static int uart_find_pattern_from_last(uint8_t* buf, int length, uint8_t pat_chr
}
//internal isr handler for default driver code.
static void uart_rx_intr_handler_default(void *param)
static void UART_ISR_ATTR uart_rx_intr_handler_default(void *param)
{
uart_obj_t *p_uart = (uart_obj_t*) param;
uint8_t uart_num = p_uart->uart_num;
@ -1354,7 +1361,13 @@ esp_err_t uart_driver_install(uart_port_t uart_num, int rx_buffer_size, int tx_b
UART_CHECK((uart_num < UART_NUM_MAX), "uart_num error", ESP_FAIL);
UART_CHECK((rx_buffer_size > UART_FIFO_LEN), "uart rx buffer length error(>128)", ESP_FAIL);
UART_CHECK((tx_buffer_size > UART_FIFO_LEN) || (tx_buffer_size == 0), "uart tx buffer length error(>128 or 0)", ESP_FAIL);
UART_CHECK((intr_alloc_flags & ESP_INTR_FLAG_IRAM) == 0, "ESP_INTR_FLAG_IRAM set in intr_alloc_flags", ESP_FAIL); /* uart_rx_intr_handler_default is not in IRAM */
#if CONFIG_UART_ISR_IN_IRAM
UART_CHECK((intr_alloc_flags & ESP_INTR_FLAG_IRAM) != 0,
"should set ESP_INTR_FLAG_IRAM flag when CONFIG_UART_ISR_IN_IRAM is enabled", ESP_FAIL);
#else
UART_CHECK((intr_alloc_flags & ESP_INTR_FLAG_IRAM) == 0,
"should not set ESP_INTR_FLAG_IRAM when CONFIG_UART_ISR_IN_IRAM is not enabled", ESP_FAIL);
#endif
if(p_uart_obj[uart_num] == NULL) {
p_uart_obj[uart_num] = (uart_obj_t*) calloc(1, sizeof(uart_obj_t));