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esp8266: Implement task-based, event-driven interface with UART.

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This enables proper interfacing with underlying OS - MicroPython doesn't
run the main loop, OS does, MicroPython just gets called when some event
takes place.
This commit is contained in:
Paul Sokolovsky
2015-01-16 01:54:40 +02:00
parent 0abb5609b0
commit f12ea7c7ed
4 changed files with 32 additions and 1 deletions
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20
esp8266/uart.c
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@@ -16,6 +16,8 @@
#include "uart_register.h"
#include "etshal.h"
#include "c_types.h"
#include "user_interface.h"
#include "esp_mphal.h"
#define RX_BUF_SIZE (256)
@@ -27,6 +29,8 @@ static uint16_t rx_buf_in;
static uint16_t rx_buf_out;
static uint8_t rx_buf[RX_BUF_SIZE];
static os_event_t uart_evt_queue[16];
static void uart0_rx_intr_handler(void *para);
/******************************************************************************
@@ -148,11 +152,15 @@ static void uart0_rx_intr_handler(void *para) {
read_chars:
while (READ_PERI_REG(UART_STATUS(uart_no)) & (UART_RXFIFO_CNT << UART_RXFIFO_CNT_S)) {
RcvChar = READ_PERI_REG(UART_FIFO(uart_no)) & 0xff;
#if 1 //MICROPY_REPL_EVENT_DRIVEN is not available here
system_os_post(UART_TASK_ID, 0, RcvChar);
#else
uint16_t rx_buf_in_next = (rx_buf_in + 1) % RX_BUF_SIZE;
if (rx_buf_in_next != rx_buf_out) {
rx_buf[rx_buf_in] = RcvChar;
rx_buf_in = rx_buf_in_next;
}
#endif
}
}
}
@@ -189,3 +197,15 @@ void ICACHE_FLASH_ATTR uart_init(UartBautRate uart0_br, UartBautRate uart1_br) {
void ICACHE_FLASH_ATTR uart_reattach() {
uart_init(UART_BIT_RATE_74880, UART_BIT_RATE_74880);
}
// Task-based UART interface
int pyexec_friendly_repl_process_char(int c);
void uart_task_handler(os_event_t *evt) {
pyexec_friendly_repl_process_char(evt->par);
}
void uart_task_init() {
system_os_task(uart_task_handler, UART_TASK_ID, uart_evt_queue, sizeof(uart_evt_queue) / sizeof(*uart_evt_queue));
}