Hi ,
Can someone please confirm whether the UART0 of M4 core in i.MX8X is shared/used by the SCU for showing debug prints by default?
I came across this in the board.c file of mek board in the SCFW porting kit (L6.1.36_2.1.0_SCFWKIT-1.15.0).
sc_pm_clock_rate_t rate = SC_24MHZ;
static sc_bool_t banner = SC_FALSE;
/* Configure pads */
pad_force_mux(SC_P_ADC_IN2, 1, SC_PAD_CONFIG_NORMAL,
SC_PAD_ISO_OFF);
pad_force_mux(SC_P_ADC_IN3, 1, SC_PAD_CONFIG_NORMAL,
SC_PAD_ISO_OFF);/* Power and enable clock */
pm_force_resource_power_mode_v(SC_R_SC_PID0,
SC_PM_PW_MODE_ON);
pm_force_resource_power_mode_v(SC_R_DBLOGIC,
SC_PM_PW_MODE_ON);
pm_force_resource_power_mode_v(SC_R_DB, SC_PM_PW_MODE_ON);
pm_force_resource_power_mode_v(SC_R_M4_0_UART,
SC_PM_PW_MODE_ON);
(void) pm_set_clock_rate(SC_PT, SC_R_M4_0_UART, SC_PM_CLK_PER,
&rate);
(void) pm_clock_enable(SC_PT, SC_R_M4_0_UART, SC_PM_CLK_PER,
SC_TRUE, SC_FALSE);/* Configure UART */
main_config_debug_uart(LPUART_DEBUG, rate);
From the reference manual(IMX8DQXPRM), I saw that ADC_IN3 pin has only the following muxes and no scu_uart_tx.
Similar mux values are present for ADC_IN2 as well.
The muxing is set for M40_UART0_TX and M40_UART0_RX.
Any help will be deeply appreciated.
