diff options
Diffstat (limited to 'keyboards/sp111/mcp23018.c')
-rw-r--r-- | keyboards/sp111/mcp23018.c | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/keyboards/sp111/mcp23018.c b/keyboards/sp111/mcp23018.c new file mode 100644 index 000000000..f1d8e568d --- /dev/null +++ b/keyboards/sp111/mcp23018.c @@ -0,0 +1,120 @@ +/* Copyright 2020 zvecr<git@zvecr.com> + * + * 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 "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, uint8_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, uint8_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, uint8_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; +} |