gy-521/tests/gy521_driver/test_gy521_driver.c

133 lines
3.4 KiB
C

#include <stdarg.h>
#include <stddef.h>
#include <stdint.h>
#include <setjmp.h>
#include <stdlib.h>
#include <cmocka.h>
#include "gy521_driver.h"
#define WRITE_BIT (1<<7)
typedef struct reg_addr{
uint8_t dev_addr;
uint8_t addr;
uint8_t value;
}reg_addr;
reg_addr reg_addr_arr[16] = {{0x0, 0x0, 0x0}};
uint8_t idx = 0;
/* Fake Object for TWI_TX*/
void fake_twi_tx(uint8_t slave_addr, uint8_t *data, uint8_t size)
{
/*Save the slave address passed*/
reg_addr_arr[0].dev_addr = slave_addr;
/*Now write all the passed data*/
for(; idx < size; idx++) {
reg_addr_arr[idx].addr = *(data);
reg_addr_arr[idx].value = *(++data);
}
/*Post increment the global index*/
idx++;
}
/* Fake Object for TWI_RX*/
void fake_twi_rx(uint8_t slave_addr, uint8_t *data, uint8_t size)
{
/*Save the slave address passed*/
reg_addr_arr[0].dev_addr = slave_addr;
/*Read the registers requested*/
for(; idx < size; idx++) {
/*Wridxte the register read address*/
reg_addr_arr[idx].addr = *(data + idx);
/*Read the response value idxnto the pased data ptr*/
*(data + idx) = reg_addr_arr[idx].value;
}
/*Post increment the global index*/
idx++;
}
/*Setup the fake twi*/
void (*gy521_twi_tx)(uint8_t, uint8_t*, uint8_t) = &fake_twi_tx;
void (*gy521_twi_rx)(uint8_t, uint8_t*, uint8_t) = &fake_twi_rx;
/* Tests the donothing function */
static void test_gy521_init(void **state) {
gy521_module *m = gy521_new();
assert_false(gy521_init(m, 0x0));
assert_false(gy521_init(m, 0x67));
assert_false(gy521_init(m, 0x6A));
/*Check for it's confirmation of the right twi device*/
assert_false(gy521_init(m, TWI_GY521_ADDR1));
/*Fill the address and the value registers with correct response value*/
/*The zero element get's read on init of the module*/
reg_addr_arr[0].addr = TWI_GY521_ADDR1;
reg_addr_arr[0].value = TWI_GY521_ADDR1;
idx = 0;
/*Check that it worked*/
assert_true(gy521_init(m, TWI_GY521_ADDR1));
assert_true(TWI_GY521_ADDR1 == reg_addr_arr[0].dev_addr);
reg_addr_arr[0].addr = TWI_GY521_ADDR2;
reg_addr_arr[0].value = TWI_GY521_ADDR2;
idx = 0;
assert_true(gy521_init(m, TWI_GY521_ADDR2));
assert_true(TWI_GY521_ADDR2 == reg_addr_arr[0].dev_addr);
gy521_free(m);
}
static void test_gy521_update_accel(void **sate)
{
/*check it reads the accel registers*/
gy521_module *m = gy521_new();
reg_addr_arr[0].addr = TWI_GY521_ADDR1;
gy521_init(m, TWI_GY521_ADDR1);
/*Setup the fake accel values.*/
for(uint8_t i = 0; i < 6; i++) {
reg_addr_arr[i].value = i;
}
idx = 0;
gy521_update_accel(m);
/*Ensure the correct registers are read*/
_Bool is_correct = 1;
for(int i = 0; i < 6; i++){
/*The starting address of the registers is 59 and goes to 64*/
print_message("expected: %d, actual: %d\n", (59+i), reg_addr_arr[i].addr);
if((59 + i) != reg_addr_arr[i].addr) {
is_correct = 0;
}
}
assert_true(is_correct);
/*Check that the values are assembled correctly*/
gy521_free(m);
}
int main(void)
{
const struct CMUnitTest tests[] = {
cmocka_unit_test(test_gy521_init),
cmocka_unit_test(test_gy521_update_accel),
};
return cmocka_run_group_tests(tests, NULL, NULL);
}