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uart: add support for REF_TICK

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This commit is contained in:
Ivan Grokhotkov
2017-08-21 22:30:23 +08:00
parent bfeecd2b56
commit fba9678c56
4 changed files with 43 additions and 18 deletions
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13
components/esp32/cpu_start.c
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@@ -289,9 +289,18 @@ void start_cpu0_default(void)
esp_clk_init();
esp_perip_clk_init();
intr_matrix_clear();
#ifndef CONFIG_CONSOLE_UART_NONE
uart_div_modify(CONFIG_CONSOLE_UART_NUM, (rtc_clk_apb_freq_get() << 4) / CONFIG_CONSOLE_UART_BAUDRATE);
#endif
#ifdef CONFIG_PM_ENABLE
const int uart_clk_freq = REF_CLK_FREQ;
/* When DFS is enabled, use REFTICK as UART clock source */
CLEAR_PERI_REG_MASK(UART_CONF0_REG(CONFIG_CONSOLE_UART_NUM), UART_TICK_REF_ALWAYS_ON);
#else
const int uart_clk_freq = APB_CLK_FREQ;
#endif // CONFIG_PM_DFS_ENABLE
uart_div_modify(CONFIG_CONSOLE_UART_NUM, (uart_clk_freq << 4) / CONFIG_CONSOLE_UART_BAUDRATE);
#endif // CONFIG_CONSOLE_UART_NONE
#if CONFIG_BROWNOUT_DET
esp_brownout_init();
#endif