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