mirror of
https://github.com/espressif/esp-idf.git
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128 lines
2.7 KiB
C
128 lines
2.7 KiB
C
/*
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* SPDX-FileCopyrightText: 2020-2022 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include "soc/uart_periph.h"
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#include "soc/gpio_periph.h"
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#include "esp_gdbstub_common.h"
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#include "sdkconfig.h"
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#include "hal/uart_ll.h"
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#include "freertos/FreeRTOS.h"
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#include "xtensa/config/specreg.h"
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#define UART_NUM CONFIG_ESP_CONSOLE_UART_NUM
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static uart_dev_t *gdb_uart = NULL;
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void esp_gdbstub_target_init(void)
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{
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switch (UART_NUM) {
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case 0:
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gdb_uart = &UART0;
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break;
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#if SOC_UART_NUM > 1
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case 1:
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gdb_uart = &UART1;
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break;
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#endif
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#if SOC_UART_NUM > 2
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case 2:
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gdb_uart = &UART2;
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break;
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#endif
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default:
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gdb_uart = &UART0;
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break;
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}
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}
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int esp_gdbstub_getchar(void)
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{
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if (gdb_uart == NULL) {
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esp_gdbstub_target_init();
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}
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unsigned char data;
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while (uart_ll_get_rxfifo_len(gdb_uart) == 0) {
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}
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uart_ll_read_rxfifo(gdb_uart, &data, 1);
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return data;
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}
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void esp_gdbstub_putchar(int c)
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{
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if (gdb_uart == NULL) {
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esp_gdbstub_target_init();
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}
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while (uart_ll_get_txfifo_len(gdb_uart) <= 126) {
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}
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uart_ll_write_txfifo(gdb_uart, (uint8_t *)&c, 1);
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}
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void esp_gdbstub_flush()
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{
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// wait until some data in transmition
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while (false == uart_ll_is_tx_idle(gdb_uart))
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{
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}
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}
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int esp_gdbstub_getfifo()
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{
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if (gdb_uart == NULL) {
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esp_gdbstub_target_init();
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}
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int doDebug = 0;
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int fifolen = uart_ll_get_rxfifo_len(gdb_uart);
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while (fifolen != 0) {
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unsigned char data;
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uart_ll_read_rxfifo(gdb_uart, &data, 1);
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if (data == 0x3) {
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doDebug = 1; //Check if any of the chars is Ctrl+C. Throw away rest.
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}
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fifolen--;
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}
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uart_ll_clr_intsts_mask(gdb_uart, UART_INTR_RXFIFO_FULL | UART_INTR_RXFIFO_TOUT);
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return doDebug;
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}
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int esp_gdbstub_readmem(intptr_t addr)
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{
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if (addr < 0x20000000 || addr >= 0x80000000) {
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/* see cpu_configure_region_protection */
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return -1;
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}
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uint32_t val_aligned = *(uint32_t *)(addr & (~3));
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uint32_t shift = (addr & 3) * 8;
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return (val_aligned >> shift) & 0xff;
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}
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int esp_gdbstub_writemem(unsigned int addr, unsigned char data)
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{
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if (addr < 0x20000000 || addr >= 0x80000000) {
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/* see cpu_configure_region_protection */
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return -1;
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}
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int *i = (int *)(addr & (~3));
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if ((addr & 3) == 0) {
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*i = (*i & 0xffffff00) | (data << 0);
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}
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if ((addr & 3) == 1) {
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*i = (*i & 0xffff00ff) | (data << 8);
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}
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if ((addr & 3) == 2) {
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*i = (*i & 0xff00ffff) | (data << 16);
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}
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if ((addr & 3) == 3) {
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*i = (*i & 0x00ffffff) | (data << 24);
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}
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asm volatile("ISYNC\nISYNC\n");
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return 0;
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}
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