diff options
Diffstat (limited to 'drivers/gpio')
| -rw-r--r-- | drivers/gpio/mcp23018.c | 108 | ||||
| -rw-r--r-- | drivers/gpio/mcp23018.h | 65 | ||||
| -rw-r--r-- | drivers/gpio/pca9555.c | 61 | ||||
| -rw-r--r-- | drivers/gpio/pca9555.h | 81 | ||||
| -rw-r--r-- | drivers/gpio/sn74x138.c | 65 | ||||
| -rw-r--r-- | drivers/gpio/sn74x138.h | 48 |
6 files changed, 378 insertions, 50 deletions
diff --git a/drivers/gpio/mcp23018.c b/drivers/gpio/mcp23018.c new file mode 100644 index 0000000000..dc8ab03c50 --- /dev/null +++ b/drivers/gpio/mcp23018.c @@ -0,0 +1,108 @@ +// Copyright 2022 zvecr<git@zvecr.com> +// SPDX-License-Identifier: GPL-2.0-or-later + +#include "mcp23018.h" +#include "i2c_master.h" +#include "wait.h" +#include "debug.h" + +#define SLAVE_TO_ADDR(n) (n << 1) +#define TIMEOUT 100 + +enum { + CMD_IODIRA = 0x00, // i/o direction register + CMD_IODIRB = 0x01, + CMD_GPPUA = 0x0C, // GPIO pull-up resistor register + CMD_GPPUB = 0x0D, + CMD_GPIOA = 0x12, // general purpose i/o port register (write modifies OLAT) + CMD_GPIOB = 0x13, +}; + +void mcp23018_init(uint8_t addr) { + static uint8_t s_init = 0; + if (!s_init) { + i2c_init(); + wait_ms(1000); + + s_init = 1; + } +} + +bool mcp23018_set_config(uint8_t slave_addr, mcp23018_port_t port, uint8_t conf) { + uint8_t addr = SLAVE_TO_ADDR(slave_addr); + uint8_t cmdDirection = port ? CMD_IODIRB : CMD_IODIRA; + uint8_t cmdPullup = port ? CMD_GPPUB : CMD_GPPUA; + + i2c_status_t ret = i2c_writeReg(addr, cmdDirection, &conf, sizeof(conf), TIMEOUT); + if (ret != I2C_STATUS_SUCCESS) { + dprintf("mcp23018_set_config::directionFAILED::%u\n", ret); + return false; + } + + ret = i2c_writeReg(addr, cmdPullup, &conf, sizeof(conf), TIMEOUT); + if (ret != I2C_STATUS_SUCCESS) { + dprintf("mcp23018_set_config::pullupFAILED::%u\n", ret); + return false; + } + + return true; +} + +bool mcp23018_set_output(uint8_t slave_addr, mcp23018_port_t port, uint8_t conf) { + uint8_t addr = SLAVE_TO_ADDR(slave_addr); + uint8_t cmd = port ? CMD_GPIOB : CMD_GPIOA; + + i2c_status_t ret = i2c_writeReg(addr, cmd, &conf, sizeof(conf), TIMEOUT); + if (ret != I2C_STATUS_SUCCESS) { + dprintf("mcp23018_set_output::FAILED::%u\n", ret); + return false; + } + + return true; +} + +bool mcp23018_set_output_all(uint8_t slave_addr, uint8_t confA, uint8_t confB) { + uint8_t addr = SLAVE_TO_ADDR(slave_addr); + uint8_t conf[2] = {confA, confB}; + + i2c_status_t ret = i2c_writeReg(addr, CMD_GPIOA, &conf[0], sizeof(conf), TIMEOUT); + if (ret != I2C_STATUS_SUCCESS) { + dprintf("mcp23018_set_output::FAILED::%u\n", ret); + return false; + } + + return true; +} + +bool mcp23018_readPins(uint8_t slave_addr, mcp23018_port_t port, uint8_t* out) { + uint8_t addr = SLAVE_TO_ADDR(slave_addr); + uint8_t cmd = port ? CMD_GPIOB : CMD_GPIOA; + + i2c_status_t ret = i2c_readReg(addr, cmd, out, sizeof(uint8_t), TIMEOUT); + if (ret != I2C_STATUS_SUCCESS) { + dprintf("mcp23018_readPins::FAILED::%u\n", ret); + return false; + } + + return true; +} + +bool mcp23018_readPins_all(uint8_t slave_addr, uint16_t* out) { + uint8_t addr = SLAVE_TO_ADDR(slave_addr); + + typedef union { + uint8_t u8[2]; + uint16_t u16; + } data16; + + data16 data = {.u16 = 0}; + + i2c_status_t ret = i2c_readReg(addr, CMD_GPIOA, &data.u8[0], sizeof(data), TIMEOUT); + if (ret != I2C_STATUS_SUCCESS) { + dprintf("mcp23018_readPins::FAILED::%u\n", ret); + return false; + } + + *out = data.u16; + return true; +} diff --git a/drivers/gpio/mcp23018.h b/drivers/gpio/mcp23018.h new file mode 100644 index 0000000000..e7c2730dd1 --- /dev/null +++ b/drivers/gpio/mcp23018.h @@ -0,0 +1,65 @@ +// Copyright 2022 zvecr<git@zvecr.com> +// SPDX-License-Identifier: GPL-2.0-or-later + +#pragma once + +#include <stdint.h> +#include <stdbool.h> + +/** + * Port ID + */ +typedef enum { + mcp23018_PORTA, + mcp23018_PORTB, +} mcp23018_port_t; + +/** + * Helpers for set_config + */ +enum { + ALL_OUTPUT = 0, + ALL_INPUT = 0xFF, +}; + +/** + * Helpers for set_output + */ +enum { + ALL_LOW = 0, + ALL_HIGH = 0xFF, +}; + +/** + * Init expander and any other dependent drivers + */ +void mcp23018_init(uint8_t slave_addr); + +/** + * Configure input/output to a given port + */ +bool mcp23018_set_config(uint8_t slave_addr, mcp23018_port_t port, uint8_t conf); + +/** + * Write high/low to a given port + */ +bool mcp23018_set_output(uint8_t slave_addr, mcp23018_port_t port, uint8_t conf); + +/** + * Write high/low to both ports sequentially + * + * - slightly faster than multiple set_output + */ +bool mcp23018_set_output_all(uint8_t slave_addr, uint8_t confA, uint8_t confB); + +/** + * Read state of a given port + */ +bool mcp23018_readPins(uint8_t slave_addr, mcp23018_port_t port, uint8_t* ret); + +/** + * Read state of both ports sequentially + * + * - slightly faster than multiple readPins + */ +bool mcp23018_readPins_all(uint8_t slave_addr, uint16_t* ret); diff --git a/drivers/gpio/pca9555.c b/drivers/gpio/pca9555.c index 02b5abbdde..adcd040083 100644 --- a/drivers/gpio/pca9555.c +++ b/drivers/gpio/pca9555.c @@ -1,18 +1,6 @@ -/* Copyright 2019 - * - * This program is free software: you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation, either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - */ +// Copyright 2020 zvecr<git@zvecr.com> +// SPDX-License-Identifier: GPL-2.0-or-later + #include "i2c_master.h" #include "pca9555.h" @@ -45,39 +33,59 @@ void pca9555_init(uint8_t slave_addr) { // i2c_stop(); } -void pca9555_set_config(uint8_t slave_addr, uint8_t port, uint8_t conf) { +bool pca9555_set_config(uint8_t slave_addr, pca9555_port_t port, uint8_t conf) { uint8_t addr = SLAVE_TO_ADDR(slave_addr); uint8_t cmd = port ? CMD_CONFIG_1 : CMD_CONFIG_0; i2c_status_t ret = i2c_writeReg(addr, cmd, &conf, sizeof(conf), TIMEOUT); if (ret != I2C_STATUS_SUCCESS) { print("pca9555_set_config::FAILED\n"); + return false; } + + return true; } -void pca9555_set_output(uint8_t slave_addr, uint8_t port, uint8_t conf) { +bool pca9555_set_output(uint8_t slave_addr, pca9555_port_t port, uint8_t conf) { uint8_t addr = SLAVE_TO_ADDR(slave_addr); uint8_t cmd = port ? CMD_OUTPUT_1 : CMD_OUTPUT_0; i2c_status_t ret = i2c_writeReg(addr, cmd, &conf, sizeof(conf), TIMEOUT); if (ret != I2C_STATUS_SUCCESS) { print("pca9555_set_output::FAILED\n"); + return false; } + + return true; } -uint8_t pca9555_readPins(uint8_t slave_addr, uint8_t port) { +bool pca9555_set_output_all(uint8_t slave_addr, uint8_t confA, uint8_t confB) { + uint8_t addr = SLAVE_TO_ADDR(slave_addr); + uint8_t conf[2] = {confA, confB}; + + i2c_status_t ret = i2c_writeReg(addr, CMD_OUTPUT_0, &conf[0], sizeof(conf), TIMEOUT); + if (ret != I2C_STATUS_SUCCESS) { + dprintf("pca9555_set_output::FAILED::%u\n", ret); + return false; + } + + return true; +} + +bool pca9555_readPins(uint8_t slave_addr, pca9555_port_t port, uint8_t* out) { uint8_t addr = SLAVE_TO_ADDR(slave_addr); uint8_t cmd = port ? CMD_INPUT_1 : CMD_INPUT_0; - uint8_t data = 0; - i2c_status_t ret = i2c_readReg(addr, cmd, &data, sizeof(data), TIMEOUT); + i2c_status_t ret = i2c_readReg(addr, cmd, out, sizeof(uint8_t), TIMEOUT); if (ret != I2C_STATUS_SUCCESS) { print("pca9555_readPins::FAILED\n"); + return false; } - return data; + + return true; } -uint16_t pca9555_readAllPins(uint8_t slave_addr) { +bool pca9555_readPins_all(uint8_t slave_addr, uint16_t* out) { uint8_t addr = SLAVE_TO_ADDR(slave_addr); typedef union { @@ -85,11 +93,14 @@ uint16_t pca9555_readAllPins(uint8_t slave_addr) { uint16_t u16; } data16; - data16 data; + data16 data = {.u16 = 0}; i2c_status_t ret = i2c_readReg(addr, CMD_INPUT_0, &data.u8[0], sizeof(data), TIMEOUT); if (ret != I2C_STATUS_SUCCESS) { - print("pca9555_readAllPins::FAILED\n"); + print("pca9555_readPins_all::FAILED\n"); + return false; } - return data.u16; + + *out = data.u16; + return true; } diff --git a/drivers/gpio/pca9555.h b/drivers/gpio/pca9555.h index 3341ec3eb5..6362ab68ae 100644 --- a/drivers/gpio/pca9555.h +++ b/drivers/gpio/pca9555.h @@ -1,20 +1,11 @@ -/* Copyright 2019 - * - * This program is free software: you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation, either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - */ +// Copyright 2020 zvecr<git@zvecr.com> +// SPDX-License-Identifier: GPL-2.0-or-later + #pragma once +#include <stdint.h> +#include <stdbool.h> + /* PCA9555 ,----------. @@ -38,20 +29,60 @@ `----------' */ -#define PCA9555_PORT0 0 -#define PCA9555_PORT1 1 +/** + * Port ID + */ +typedef enum { + PCA9555_PORT0, + PCA9555_PORT1, +} pca9555_port_t; -#define ALL_OUTPUT 0 -#define ALL_INPUT 0xFF -#define ALL_LOW 0 -#define ALL_HIGH 0xFF +/** + * Helpers for set_config + */ +enum { + ALL_OUTPUT = 0, + ALL_INPUT = 0xFF, +}; + +/** + * Helpers for set_output + */ +enum { + ALL_LOW = 0, + ALL_HIGH = 0xFF, +}; +/** + * Init expander and any other dependent drivers + */ void pca9555_init(uint8_t slave_addr); -void pca9555_set_config(uint8_t slave_addr, uint8_t port, uint8_t conf); +/** + * Configure input/output to a given port + */ +bool pca9555_set_config(uint8_t slave_addr, pca9555_port_t port, uint8_t conf); -void pca9555_set_output(uint8_t slave_addr, uint8_t port, uint8_t conf); +/** + * Write high/low to a given port + */ +bool pca9555_set_output(uint8_t slave_addr, pca9555_port_t port, uint8_t conf); -uint8_t pca9555_readPins(uint8_t slave_addr, uint8_t port); +/** + * Write high/low to both ports sequentially + * + * - slightly faster than multiple set_output + */ +bool pca9555_set_output_all(uint8_t slave_addr, uint8_t confA, uint8_t confB); -uint16_t pca9555_readAllPins(uint8_t slave_addr); +/** + * Read state of a given port + */ +bool pca9555_readPins(uint8_t slave_addr, pca9555_port_t port, uint8_t* ret); + +/** + * Read state of both ports sequentially + * + * - slightly faster than multiple readPins + */ +bool pca9555_readPins_all(uint8_t slave_addr, uint16_t* ret); diff --git a/drivers/gpio/sn74x138.c b/drivers/gpio/sn74x138.c new file mode 100644 index 0000000000..222e5db56c --- /dev/null +++ b/drivers/gpio/sn74x138.c @@ -0,0 +1,65 @@ +/* Copyright 2022 + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include "sn74x138.h" +#include "gpio.h" + +#define ADDRESS_PIN_COUNT 3 + +#ifndef SN74X138_ADDRESS_PINS +# error sn74x138: no address pins defined! +#endif + +static const pin_t address_pins[ADDRESS_PIN_COUNT] = SN74X138_ADDRESS_PINS; + +void sn74x138_init(void) { + for (int i = 0; i < ADDRESS_PIN_COUNT; i++) { + setPinOutput(address_pins[i]); + writePinLow(address_pins[i]); + } + +#if defined(SN74X138_E1_PIN) + setPinOutput(SN74X138_E1_PIN); + writePinHigh(SN74X138_E1_PIN); +#endif + +#if defined(SN74X138_E2_PIN) + setPinOutput(SN74X138_E2_PIN); + writePinHigh(SN74X138_E2_PIN); +#endif +#if defined(SN74X138_E3_PIN) + setPinOutput(SN74X138_E3_PIN); + writePinLow(SN74X138_E3_PIN); +#endif +} + +void sn74x138_set_enabled(bool enabled) { +#if defined(SN74X138_E1_PIN) + writePin(SN74X138_E1_PIN, !enabled); +#endif +#if defined(SN74X138_E2_PIN) + writePin(SN74X138_E2_PIN, !enabled); +#endif +#if defined(SN74X138_E3_PIN) + writePin(SN74X138_E3_PIN, enabled); +#endif +} + +void sn74x138_set_addr(uint8_t address) { + for (int i = 0; i < ADDRESS_PIN_COUNT; i++) { + writePin(address_pins[i], address & (1 << i)); + } +} diff --git a/drivers/gpio/sn74x138.h b/drivers/gpio/sn74x138.h new file mode 100644 index 0000000000..6f1f20e618 --- /dev/null +++ b/drivers/gpio/sn74x138.h @@ -0,0 +1,48 @@ +/* Copyright 2022 + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#pragma once + +#include <stdint.h> +#include <stdbool.h> + +/** + * Driver for 74x138 3-to-8 decoder/demultiplexer with inverting outputs + * https://assets.nexperia.com/documents/data-sheet/74HC_HCT138.pdf + */ + +/** + * Initialize the address and output enable pins. + */ +void sn74x138_init(void); + +/** + * Set the enabled state. + * + * When enabled is true, pulls the E1 and E2 pins low, and the E3 pin high. + * + * \param enabled The enable state to set. + */ +void sn74x138_set_enabled(bool enabled); + +/** + * Set the output pin address. + * + * The selected output pin will be pulled low, while the remaining output pins will be high. + * + * \param address The address to set, from 0 to 7. + */ +void sn74x138_set_addr(uint8_t address); |