You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
90 lines
2.5 KiB
90 lines
2.5 KiB
//
|
|
// Created by MightyPork on 2018/01/02.
|
|
//
|
|
|
|
#include "comm/messages.h"
|
|
#include "unit_base.h"
|
|
#include "utils/avrlibc.h"
|
|
#include "unit_i2c.h"
|
|
|
|
// I2C master
|
|
#define I2C_INTERNAL
|
|
#include "_i2c_internal.h"
|
|
#include "_i2c_settings.h"
|
|
#include "_i2c_init.h"
|
|
|
|
enum PinCmd_ {
|
|
CMD_TEST = 0,
|
|
CMD_READ = 1,
|
|
CMD_WRITE_REG = 2,
|
|
CMD_READ_REG = 3,
|
|
};
|
|
|
|
/** Handle a request message */
|
|
static error_t UI2C_handleRequest(Unit *unit, TF_ID frame_id, uint8_t command, PayloadParser *pp)
|
|
{
|
|
uint16_t addr;
|
|
uint32_t len;
|
|
uint8_t regnum;
|
|
uint32_t size;
|
|
|
|
// NOTE: 10-bit addresses must have the highest bit set to 1 for indication (0x8000 | addr)
|
|
|
|
switch (command) {
|
|
/** Write byte(s) - addr:u16, byte(s) */
|
|
case CMD_TEST:
|
|
addr = pp_u16(pp);
|
|
const uint8_t *bb = pp_tail(pp, &len);
|
|
|
|
return UU_I2C_Write(unit, addr, bb, len);
|
|
|
|
/** Read byte(s) - addr:u16, len:u16 */
|
|
case CMD_READ:
|
|
addr = pp_u16(pp);
|
|
len = pp_u16(pp);
|
|
|
|
TRY(UU_I2C_Read(unit, addr, (uint8_t *) unit_tmp512, len));
|
|
com_respond_buf(frame_id, MSG_SUCCESS, (uint8_t *) unit_tmp512, len);
|
|
return E_SUCCESS;
|
|
|
|
/** Read register(s) - addr:u16, reg:u8, size:u16 */
|
|
case CMD_READ_REG:;
|
|
addr = pp_u16(pp);
|
|
regnum = pp_u8(pp); // register number
|
|
size = pp_u16(pp); // total number of bytes to read (allows use of auto-increment)
|
|
|
|
TRY(UU_I2C_ReadReg(unit, addr, regnum, (uint8_t *) unit_tmp512, size));
|
|
com_respond_buf(frame_id, MSG_SUCCESS, (uint8_t *) unit_tmp512, size);
|
|
return E_SUCCESS;
|
|
|
|
/** Write a register - addr:u16, reg:u8, byte(s) */
|
|
case CMD_WRITE_REG:
|
|
addr = pp_u16(pp);
|
|
regnum = pp_u8(pp); // register number
|
|
const uint8_t *tail = pp_tail(pp, &size);
|
|
|
|
return UU_I2C_WriteReg(unit, addr, regnum, tail, size);
|
|
|
|
default:
|
|
return E_UNKNOWN_COMMAND;
|
|
}
|
|
}
|
|
|
|
// ------------------------------------------------------------------------
|
|
|
|
/** Unit template */
|
|
const UnitDriver UNIT_I2C = {
|
|
.name = "I2C",
|
|
.description = "I2C master",
|
|
// Settings
|
|
.preInit = UI2C_preInit,
|
|
.cfgLoadBinary = UI2C_loadBinary,
|
|
.cfgWriteBinary = UI2C_writeBinary,
|
|
.cfgLoadIni = UI2C_loadIni,
|
|
.cfgWriteIni = UI2C_writeIni,
|
|
// Init
|
|
.init = UI2C_init,
|
|
.deInit = UI2C_deInit,
|
|
// Function
|
|
.handleRequest = UI2C_handleRequest,
|
|
};
|
|
|