mirror of https://github.com/jeelabs/esp-link.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
50 lines
1.6 KiB
50 lines
1.6 KiB
//Stupid bit of code that does the bare minimum to make os_printf work.
|
|
|
|
/*
|
|
* ----------------------------------------------------------------------------
|
|
* "THE BEER-WARE LICENSE" (Revision 42):
|
|
* Jeroen Domburg <jeroen@spritesmods.com> wrote this file. As long as you retain
|
|
* this notice you can do whatever you want with this stuff. If we meet some day,
|
|
* and you think this stuff is worth it, you can buy me a beer in return.
|
|
* ----------------------------------------------------------------------------
|
|
*/
|
|
|
|
|
|
#include "espmissingincludes.h"
|
|
#include "ets_sys.h"
|
|
#include "osapi.h"
|
|
#include "uart_hw.h"
|
|
|
|
static void ICACHE_FLASH_ATTR stdoutUartTxd(char c) {
|
|
//Wait until there is room in the FIFO
|
|
while (((READ_PERI_REG(UART_STATUS(0))>>UART_TXFIFO_CNT_S)&UART_TXFIFO_CNT)>=126) ;
|
|
//Send the character
|
|
WRITE_PERI_REG(UART_FIFO(0), c);
|
|
}
|
|
|
|
static void ICACHE_FLASH_ATTR stdoutPutchar(char c) {
|
|
//convert \n -> \r\n
|
|
if (c=='\n') stdoutUartTxd('\r');
|
|
stdoutUartTxd(c);
|
|
}
|
|
|
|
|
|
void stdoutInit() {
|
|
//Enable TxD pin
|
|
PIN_PULLUP_DIS(PERIPHS_IO_MUX_U0TXD_U);
|
|
PIN_FUNC_SELECT(PERIPHS_IO_MUX_U0TXD_U, FUNC_U0TXD);
|
|
|
|
//Set baud rate and other serial parameters to 115200,n,8,1
|
|
uart_div_modify(0, UART_CLK_FREQ/BIT_RATE_115200);
|
|
WRITE_PERI_REG(UART_CONF0(0), (STICK_PARITY_DIS)|(ONE_STOP_BIT << UART_STOP_BIT_NUM_S)| \
|
|
(EIGHT_BITS << UART_BIT_NUM_S));
|
|
|
|
//Reset tx & rx fifo
|
|
SET_PERI_REG_MASK(UART_CONF0(0), UART_RXFIFO_RST|UART_TXFIFO_RST);
|
|
CLEAR_PERI_REG_MASK(UART_CONF0(0), UART_RXFIFO_RST|UART_TXFIFO_RST);
|
|
//Clear pending interrupts
|
|
WRITE_PERI_REG(UART_INT_CLR(0), 0xffff);
|
|
|
|
//Install our own putchar handler
|
|
os_install_putc1((void *)stdoutPutchar);
|
|
}
|
|
|