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extmod/machine_i2c: Add argument to C funcs to control stop generation.

This commit is contained in:
Damien George 2016-11-22 22:55:58 +11:00
parent b983cfaf41
commit bc4ea69795
1 changed files with 14 additions and 13 deletions
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27
extmod/machine_i2c.c
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@ -183,7 +183,7 @@ STATIC int mp_hal_i2c_write_addresses(machine_i2c_obj_t *self, uint8_t addr,
}
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) {
uint32_t memaddr, uint8_t addrsize, const uint8_t *src, size_t len, bool stop) {
// start the I2C transaction
if (!mp_hal_i2c_start(self)) {
goto er;
@ -202,7 +202,7 @@ STATIC void mp_hal_i2c_write_mem(machine_i2c_obj_t *self, uint8_t addr,
}
// finish the I2C transaction
if (!mp_hal_i2c_stop(self)) {
if (stop && !mp_hal_i2c_stop(self)) {
goto er;
}
return;
@ -213,7 +213,7 @@ er:
}
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) {
uint32_t memaddr, uint8_t addrsize, uint8_t *dest, size_t len, bool stop) {
// start the I2C transaction
if (!mp_hal_i2c_start(self)) {
goto er;
@ -239,7 +239,7 @@ STATIC void mp_hal_i2c_read_mem(machine_i2c_obj_t *self, uint8_t addr,
goto er;
}
}
if (!mp_hal_i2c_stop(self)) {
if (stop && !mp_hal_i2c_stop(self)) {
goto er;
}
return;
@ -249,12 +249,12 @@ 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) {
mp_hal_i2c_write_mem(self, addr, 0, 0, src, len);
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) {
mp_hal_i2c_read_mem(self, addr, 0, 0, dest, len);
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);
}
/******************************************************************************/
@ -428,8 +428,9 @@ STATIC mp_obj_t machine_i2c_readfrom_mem(size_t n_args, const mp_obj_t *pos_args
vstr_init_len(&vstr, mp_obj_get_int(args[ARG_n].u_obj));
// do the transfer
mp_hal_i2c_read_mem(self, args[ARG_addr].u_int, args[ARG_memaddr].u_int,
args[ARG_addrsize].u_int, (uint8_t*)vstr.buf, vstr.len);
args[ARG_addrsize].u_int, (uint8_t*)vstr.buf, vstr.len, true);
return mp_obj_new_str_from_vstr(&mp_type_bytes, &vstr);
}
MP_DEFINE_CONST_FUN_OBJ_KW(machine_i2c_readfrom_mem_obj, 1, machine_i2c_readfrom_mem);
@ -448,7 +449,7 @@ STATIC mp_obj_t machine_i2c_readfrom_mem_into(size_t n_args, const mp_obj_t *pos
// do the transfer
mp_hal_i2c_read_mem(self, args[ARG_addr].u_int, args[ARG_memaddr].u_int,
args[ARG_addrsize].u_int, bufinfo.buf, bufinfo.len);
args[ARG_addrsize].u_int, bufinfo.buf, bufinfo.len, true);
return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_KW(machine_i2c_readfrom_mem_into_obj, 1, machine_i2c_readfrom_mem_into);
@ -466,7 +467,7 @@ STATIC mp_obj_t machine_i2c_writeto_mem(size_t n_args, const mp_obj_t *pos_args,
// do the transfer
mp_hal_i2c_write_mem(self, args[ARG_addr].u_int, args[ARG_memaddr].u_int,
args[ARG_addrsize].u_int, bufinfo.buf, bufinfo.len);
args[ARG_addrsize].u_int, bufinfo.buf, bufinfo.len, true);
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_KW(machine_i2c_writeto_mem_obj, 1, machine_i2c_writeto_mem);
@ -532,13 +533,13 @@ int mp_machine_soft_i2c_write(mp_obj_base_t *self_in, const uint8_t *src, size_t
int mp_machine_soft_i2c_readfrom(mp_obj_base_t *self_in, uint16_t addr, uint8_t *dest, size_t len, bool stop) {
machine_i2c_obj_t *self = (machine_i2c_obj_t*)self_in;
mp_hal_i2c_read(self, addr, dest, len);
mp_hal_i2c_read(self, addr, dest, len, stop);
return 0; // success
}
int mp_machine_soft_i2c_writeto(mp_obj_base_t *self_in, uint16_t addr, const uint8_t *src, size_t len, bool stop) {
machine_i2c_obj_t *self = (machine_i2c_obj_t*)self_in;
mp_hal_i2c_write(self, addr, src, len);
mp_hal_i2c_write(self, addr, src, len, stop);
return 0; // success
}