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etm trace for nrf52840

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This commit is contained in:
hathach
2023-06-20 13:19:08 +07:00
parent 1b658ae109
commit 19c99d3b42
5 changed files with 278 additions and 11 deletions
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25
hw/bsp/nrf/family.c
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@@ -93,8 +93,33 @@ TU_ATTR_UNUSED static void power_event_handler(nrfx_power_usb_evt_t event)
tusb_hal_nrf_power_event((uint32_t) event);
}
#ifdef TRACE_ETM
void trace_etm_init(void) {
#ifdef NRF52840_XXAA
// Trace clk: P0.7, Trace D0..D3: P1.0, P0.11, P0.12, P1.09
// Setting drive strength to H0H1
uint32_t const pin_cnf = (GPIO_PIN_CNF_DRIVE_H0H1 << GPIO_PIN_CNF_DRIVE_Pos) |
(GPIO_PIN_CNF_INPUT_Disconnect << GPIO_PIN_CNF_INPUT_Pos);
NRF_P0->PIN_CNF[ 7] = pin_cnf; // CLK
NRF_P1->PIN_CNF[ 0] = pin_cnf; // D0
NRF_P0->PIN_CNF[11] = pin_cnf; // D1
NRF_P0->PIN_CNF[12] = pin_cnf; // D2
NRF_P1->PIN_CNF[ 9] = pin_cnf; // D3
// trace clock = 16 Mhz, Trace mux = parallel
NRF_CLOCK->TRACECONFIG = (CLOCK_TRACECONFIG_TRACEPORTSPEED_32MHz << CLOCK_TRACECONFIG_TRACEPORTSPEED_Pos) |
(CLOCK_TRACECONFIG_TRACEMUX_Parallel << CLOCK_TRACECONFIG_TRACEMUX_Pos);
#endif
}
#else
#define trace_etm_init()
#endif
void board_init(void)
{
trace_etm_init();
// stop LF clock just in case we jump from application without reset
NRF_CLOCK->TASKS_LFCLKSTOP = 1UL;