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Merge pull request #6034 from tannewt/i2c_power

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Tweak I2C and TFT power pin defaults
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Scott Shawcroft 2022-02-15 18:00:34 -08:00 committed by GitHub
commit 11647f56e4
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GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 17 additions and 8 deletions
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5
ports/espressif/boards/adafruit_feather_esp32s2/board.c
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@ -32,10 +32,7 @@
#include "common-hal/microcontroller/Pin.h"
void board_init(void) {
// Turn on I2C
common_hal_never_reset_pin(&pin_GPIO7);
gpio_set_direction(7, GPIO_MODE_DEF_OUTPUT);
gpio_set_level(7, false);
reset_board();
}
bool board_requests_safe_mode(void) {

14
ports/espressif/boards/adafruit_feather_esp32s2_tft/board.c
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@ -71,12 +71,13 @@ uint8_t display_init_sequence[] = {
void board_init(void) {
// I2C/TFT power pin
// Never reset the I2C/TFT power pin because doing so will reset the display.
// Instead, on reset set the default value and free the pin for user use.
// Relying on the normal pin reset would briefly float/pull the pin that
// could lead to a power brownout.
common_hal_never_reset_pin(&pin_GPIO21);
// Turn on TFT and I2C
gpio_set_direction(21, GPIO_MODE_DEF_OUTPUT);
gpio_set_level(21, true);
reset_board();
busio_spi_obj_t *spi = common_hal_board_create_spi(0);
displayio_fourwire_obj_t *bus = &displays[0].fourwire_bus;
@ -138,8 +139,13 @@ bool board_requests_safe_mode(void) {
}
void reset_board(void) {
// Turn on TFT and I2C
gpio_set_direction(21, GPIO_MODE_DEF_OUTPUT);
gpio_set_level(21, true);
free_pin_number(21);
}
void board_deinit(void) {
// TODO: Should we turn off the display when asleep?
}

4
ports/espressif/common-hal/microcontroller/Pin.c
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@ -133,6 +133,10 @@ void claim_pin(const mcu_pin_obj_t *pin) {
in_use[pin->number / 32] |= (1 << (pin->number % 32));
}
void free_pin_number(gpio_num_t pin_number) {
in_use[pin_number / 32] &= ~(1 << (pin_number % 32));
}
void common_hal_mcu_pin_claim(const mcu_pin_obj_t *pin) {
claim_pin(pin);
}

2
ports/espressif/common-hal/microcontroller/Pin.h
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@ -39,6 +39,8 @@ void common_hal_reset_pin(const mcu_pin_obj_t *pin);
void common_hal_never_reset_pin(const mcu_pin_obj_t *pin);
void claim_pin(const mcu_pin_obj_t *pin);
void claim_pin_number(gpio_num_t pin_number);
// Free the pin without resetting it.
void free_pin_number(gpio_num_t pin_number);
bool pin_number_is_free(gpio_num_t pin_number);
void never_reset_pin_number(gpio_num_t pin_number);