Merge pull request #1647 from tannewt/swd_pin_reuse
Fix custom pin in use logic for SWD
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634791acdc
@ -45,13 +45,25 @@ bool speaker_enable_in_use;
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#define PORT_COUNT (PORT_BITS / 32 + 1)
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#ifdef SAMD51
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#define SWD_MUX GPIO_PIN_FUNCTION_H
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#endif
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#ifdef SAMD21
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#define SWD_MUX GPIO_PIN_FUNCTION_G
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#endif
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STATIC uint32_t never_reset_pins[PORT_COUNT];
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void reset_all_pins(void) {
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uint32_t pin_mask[PORT_COUNT] = PORT_OUT_IMPLEMENTED;
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// Do not full reset USB or SWD lines.
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pin_mask[0] &= ~(PORT_PA24 | PORT_PA25 | PORT_PA30 | PORT_PA31);
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// Do not full reset USB lines.
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pin_mask[0] &= ~(PORT_PA24 | PORT_PA25);
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// Do not reset SWD when a debugger is present.
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if (DSU->STATUSB.bit.DBGPRES == 1) {
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pin_mask[0] &= ~(PORT_PA30 | PORT_PA31);
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}
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for (uint32_t i = 0; i < PORT_COUNT; i++) {
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pin_mask[i] &= ~never_reset_pins[i];
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@ -66,16 +78,14 @@ void reset_all_pins(void) {
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gpio_set_port_direction(GPIO_PORTD, pin_mask[3] & ~MICROPY_PORT_D, GPIO_DIRECTION_OFF);
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#endif
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// Configure SWD
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// Configure SWD. SWDIO will be automatically switched on PA31 when a signal is input on
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// SWCLK.
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#ifdef SAMD51
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gpio_set_pin_function(PIN_PA30, MUX_PA30H_CM4_SWCLK);
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// SWDIO will be automatically switched on PA31 when a signal is input on
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// SWCLK.
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#endif
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#ifdef SAMD21
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//gpio_set_pin_function(PIN_PA30, GPIO_PIN_FUNCTION_G);
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//gpio_set_pin_direction(PIN_PA31, GPIO_DIRECTION_OUT);
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//gpio_set_pin_function(PIN_PA31, GPIO_PIN_FUNCTION_G);
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gpio_set_pin_function(PIN_PA30, GPIO_PIN_FUNCTION_G);
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gpio_set_pin_function(PIN_PA31, GPIO_PIN_FUNCTION_G);
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#endif
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#ifdef MICROPY_HW_NEOPIXEL
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@ -128,12 +138,11 @@ void reset_pin_number(uint8_t pin_number) {
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if (pin_number == PIN_PA30
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#ifdef SAMD51
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) {
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gpio_set_pin_function(pin_number, GPIO_PIN_FUNCTION_H);
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#endif
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#ifdef SAMD21
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|| pin_number == PIN_PA31) {
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gpio_set_pin_function(pin_number, GPIO_PIN_FUNCTION_G);
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#endif
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gpio_set_pin_function(pin_number, SWD_MUX);
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} else {
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gpio_set_pin_direction(pin_number, GPIO_DIRECTION_OFF);
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gpio_set_pin_function(pin_number, GPIO_PIN_FUNCTION_OFF);
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@ -178,7 +187,18 @@ bool pin_number_is_free(uint8_t pin_number) {
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volatile PORT_PMUX_Type *pmux = &port->PMUX[pin_index / 2];
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if (pin_number == PIN_PA30 || pin_number == PIN_PA31) {
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return state->bit.PMUXEN == 1 && ((pmux->reg >> (4 * pin_index % 2)) & 0xf) == 0x6;
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if (DSU->STATUSB.bit.DBGPRES == 1) {
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return false;
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}
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if (pin_number == PIN_PA30
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#ifdef SAMD51
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) {
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#endif
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#ifdef SAMD21
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|| pin_number == PIN_PA31) {
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#endif) {
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return state->bit.PMUXEN == 1 && ((pmux->reg >> (4 * pin_index % 2)) & 0xf) == SWD_MUX;
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}
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}
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return state->bit.PMUXEN == 0 && state->bit.INEN == 0 &&
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@ -188,6 +208,10 @@ bool pin_number_is_free(uint8_t pin_number) {
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bool common_hal_mcu_pin_is_free(const mcu_pin_obj_t* pin) {
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#ifdef MICROPY_HW_NEOPIXEL
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if (pin == MICROPY_HW_NEOPIXEL) {
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// Special case for Metro M0 where the NeoPixel is also SWCLK
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if (MICROPY_HW_NEOPIXEL == &pin_PA30 && DSU->STATUSB.bit.DBGPRES == 1) {
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return false;
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}
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return !neopixel_in_use;
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}
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#endif
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