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extmod/machine_i2c: Remove unneeded i2c_write_mem/i2c_read_mem funcs.

This commit is contained in:
Damien George 2016-11-23 12:26:37 +11:00
parent 96c3911a0a
commit 946f8dd46f
1 changed files with 4 additions and 40 deletions
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44
extmod/machine_i2c.c
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@ -168,29 +168,14 @@ STATIC int mp_hal_i2c_read_byte(machine_i2c_obj_t *self, uint8_t *val, int nack)
return 1; // success
}
// addr is the device address, memaddr is a memory address sent big-endian
STATIC int mp_hal_i2c_write_addresses(machine_i2c_obj_t *self, uint8_t addr,
uint32_t memaddr, uint8_t addrsize) {
if (!mp_hal_i2c_write_byte(self, addr << 1)) {
return 0; // error
}
for (int16_t i = addrsize - 8; i >= 0; i -= 8) {
if (!mp_hal_i2c_write_byte(self, memaddr >> i)) {
return 0; // error
}
}
return 1; // success
}
STATIC void mp_hal_i2c_write_mem(machine_i2c_obj_t *self, uint8_t addr,
uint32_t memaddr, uint8_t addrsize, const uint8_t *src, size_t len, bool stop) {
STATIC void mp_hal_i2c_write(machine_i2c_obj_t *self, uint8_t addr, const uint8_t *src, size_t len, bool stop) {
// start the I2C transaction
if (!mp_hal_i2c_start(self)) {
goto er;
}
// write the slave address and the memory address within the slave
if (!mp_hal_i2c_write_addresses(self, addr, memaddr, addrsize)) {
// write the slave address
if (!mp_hal_i2c_write_byte(self, addr << 1)) {
goto er;
}
@ -212,25 +197,12 @@ er:
nlr_raise(mp_obj_new_exception_msg(&mp_type_OSError, "I2C bus error"));
}
STATIC void mp_hal_i2c_read_mem(machine_i2c_obj_t *self, uint8_t addr,
uint32_t memaddr, uint8_t addrsize, uint8_t *dest, size_t len, bool stop) {
STATIC void mp_hal_i2c_read(machine_i2c_obj_t *self, uint8_t addr, uint8_t *dest, size_t len, bool stop) {
// start the I2C transaction
if (!mp_hal_i2c_start(self)) {
goto er;
}
if (addrsize) {
// write the slave address and the memory address within the slave
if (!mp_hal_i2c_write_addresses(self, addr, memaddr, addrsize)) {
goto er;
}
// i2c_read will do a repeated start, and then read the I2C memory
if (!mp_hal_i2c_start(self)) {
goto er;
}
}
if (!mp_hal_i2c_write_byte(self, (addr << 1) | 1)) {
goto er;
}
@ -249,14 +221,6 @@ er:
nlr_raise(mp_obj_new_exception_msg(&mp_type_OSError, "I2C bus error"));
}
STATIC void mp_hal_i2c_write(machine_i2c_obj_t *self, uint8_t addr, const uint8_t *src, size_t len, bool stop) {
mp_hal_i2c_write_mem(self, addr, 0, 0, src, len, stop);
}
STATIC void mp_hal_i2c_read(machine_i2c_obj_t *self, uint8_t addr, uint8_t *dest, size_t len, bool stop) {
mp_hal_i2c_read_mem(self, addr, 0, 0, dest, len, stop);
}
/******************************************************************************/
// MicroPython bindings for I2C