diff options
| author | info@mode42.com <info@mode42.com> | 2026-08-07 18:15:00 +0000 |
|---|---|---|
| committer | info@mode42.com <info@mode42.com> | 2026-08-07 18:15:00 +0000 |
| commit | d393e0c30192611d4cac65a5429fd7180ce1f49c (patch) | |
| tree | 7e47bd930340c75c4802801a81f3bd17c2469d9f /firmware/c1224/src/common/board_pins.c | |
Initial pushmain
Diffstat (limited to 'firmware/c1224/src/common/board_pins.c')
| -rw-r--r-- | firmware/c1224/src/common/board_pins.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/firmware/c1224/src/common/board_pins.c b/firmware/c1224/src/common/board_pins.c new file mode 100644 index 0000000..a199946 --- /dev/null +++ b/firmware/c1224/src/common/board_pins.c @@ -0,0 +1,45 @@ +/* + * Board GPIO setup — T-Modem-c1224 service Pico. + * Copyright (C) 2026 T-Modem contributors + * SPDX-License-Identifier: GPL-3.0-or-later + */ +#include "board_pins.h" +#include "hardware/gpio.h" +#include "hardware/i2c.h" + +void board_pins_init(void) +{ + /* Modem digital */ + gpio_init(PIN_MODEM_TXD); + gpio_set_dir(PIN_MODEM_TXD, GPIO_OUT); + gpio_put(PIN_MODEM_TXD, 0); + + gpio_init(PIN_MODEM_RXD); + gpio_set_dir(PIN_MODEM_RXD, GPIO_IN); + gpio_pull_up(PIN_MODEM_RXD); + + gpio_init(PIN_MODEM_CDT); + gpio_set_dir(PIN_MODEM_CDT, GPIO_IN); + /* CDT polarity is chip-dependent; no pull forced beyond weak up for floating unpopulated */ + gpio_pull_up(PIN_MODEM_CDT); + + /* GP14/GP15 mux placeholders — leave unused (single-XTAL v1.0) */ + + /* LEDs */ + gpio_init(PIN_LED_PTT); + gpio_set_dir(PIN_LED_PTT, GPIO_OUT); + gpio_put(PIN_LED_PTT, 0); + gpio_init(PIN_LED_DCD); + gpio_set_dir(PIN_LED_DCD, GPIO_OUT); + gpio_put(PIN_LED_DCD, 0); + gpio_init(PIN_LED_TXRX); + gpio_set_dir(PIN_LED_TXRX, GPIO_OUT); + gpio_put(PIN_LED_TXRX, 0); + + /* I2C for LCD backpack (may be absent — display layer tolerates NACK) */ + i2c_init(i2c0, I2C_LCD_BAUDRATE); + gpio_set_function(PIN_I2C_SDA, GPIO_FUNC_I2C); + gpio_set_function(PIN_I2C_SCL, GPIO_FUNC_I2C); + gpio_pull_up(PIN_I2C_SDA); + gpio_pull_up(PIN_I2C_SCL); +} |