diff options
| author | Drashna Jaelre | 2025-11-11 13:02:35 +0100 |
|---|---|---|
| committer | GitHub | 2025-11-11 13:02:35 +0100 |
| commit | 28eeb92f8eec5b8268d2a74ad0561670d14e189a (patch) | |
| tree | 55e9a33aa1bd678116118da48a103f7ef4365061 /platforms | |
| parent | efc5d63383b64291f25c8377bcfae8178dd63302 (diff) | |
Add I2C Transmit and Receive function (#25637)
* feat: adds a transmit and receive i2c method
* fix: address the i2c transmit and receive length on u16
* Add AVR/LUFA implementation
Didn't add a progmem version, since that would only apply to receive.
Figured it wasn't worth it, but can add.
* Rearrange order of functions
* Add docs
* Fix doc gen error
* Fix lint issues
* fix more lint issues
Diffstat (limited to 'platforms')
| -rw-r--r-- | platforms/avr/drivers/i2c_master.c | 26 | ||||
| -rw-r--r-- | platforms/chibios/drivers/i2c_master.c | 6 |
2 files changed, 32 insertions, 0 deletions
diff --git a/platforms/avr/drivers/i2c_master.c b/platforms/avr/drivers/i2c_master.c index 9136f4a7b9..e5caa995cf 100644 --- a/platforms/avr/drivers/i2c_master.c +++ b/platforms/avr/drivers/i2c_master.c @@ -207,6 +207,32 @@ i2c_status_t i2c_receive(uint8_t address, uint8_t* data, uint16_t length, uint16 return (status < 0) ? status : I2C_STATUS_SUCCESS; } +i2c_status_t i2c_transmit_and_receive(uint8_t address, const uint8_t* tx_data, uint16_t tx_length, uint8_t* rx_data, uint16_t rx_length, uint16_t timeout) { + i2c_status_t status = i2c_start(address | I2C_ACTION_WRITE, timeout); + + for (uint16_t i = 0; i < tx_length && status >= 0; i++) { + status = i2c_write(tx_data[i], timeout); + } + + for (uint16_t i = 0; i < (rx_length - 1) && status >= 0; i++) { + status = i2c_read_ack(timeout); + if (status >= 0) { + rx_data[i] = status; + } + } + + if (status >= 0) { + status = i2c_read_nack(timeout); + if (status >= 0) { + rx_data[(rx_length - 1)] = status; + } + } + + i2c_stop(); + + return status; +} + i2c_status_t i2c_write_register(uint8_t devaddr, uint8_t regaddr, const uint8_t* data, uint16_t length, uint16_t timeout) { i2c_status_t status = i2c_start(devaddr | 0x00, timeout); if (status >= 0) { diff --git a/platforms/chibios/drivers/i2c_master.c b/platforms/chibios/drivers/i2c_master.c index 20850859b5..a44051b82a 100644 --- a/platforms/chibios/drivers/i2c_master.c +++ b/platforms/chibios/drivers/i2c_master.c @@ -160,6 +160,12 @@ i2c_status_t i2c_receive(uint8_t address, uint8_t* data, uint16_t length, uint16 return i2c_epilogue(status); } +i2c_status_t i2c_transmit_and_receive(uint8_t address, const uint8_t* tx_data, uint16_t tx_length, uint8_t* rx_data, uint16_t rx_length, uint16_t timeout) { + i2cStart(&I2C_DRIVER, &i2cconfig); + msg_t status = i2cMasterTransmitTimeout(&I2C_DRIVER, (address >> 1), tx_data, tx_length, rx_data, rx_length, TIME_MS2I(timeout)); + return i2c_epilogue(status); +} + i2c_status_t i2c_write_register(uint8_t devaddr, uint8_t regaddr, const uint8_t* data, uint16_t length, uint16_t timeout) { i2cStart(&I2C_DRIVER, &i2cconfig); |