spi: add test

Signed-off-by: Francois Berder <[email protected]>

Author: francois-berder

tests/CMakeLists.txt

@@ -33,3 +33,7 @@ install(TARGETS test_gpio_monitor RUNTIME DESTINATION bin)
 add_executable(test_i2c test_i2c.c $<TARGET_OBJECTS:common>)
 target_link_libraries(test_i2c letmecreate_core)
 install(TARGETS test_i2c RUNTIME DESTINATION bin)
+
+add_executable(test_spi test_spi.c $<TARGET_OBJECTS:common>)
+target_link_libraries(test_spi letmecreate_core)
+install(TARGETS test_spi RUNTIME DESTINATION bin)

tests/test_spi.c

@@ -0,0 +1,123 @@
+/**
+ * @brief Implement SPI section of miscellaneous/testing_plan.
+ * @author Francois Berder
+ * @date 2016
+ * @copyright 3-clause BSD
+ */
+
+
+#include <linux/spi/spidev.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "common.h"
+#include "core/common.h"
+#include "core/spi.h"
+
+#define ADXL345_DEVICE_ID_REG           (0x00)
+#define ADXL345_DEVICE_ID               (0xE5)
+
+static bool test_spi_set_mode_before_init(void)
+{
+    return spi_set_mode(MIKROBUS_1, SPI_MODE_0) == -1
+        && spi_set_mode(MIKROBUS_2, SPI_MODE_0) == -1;
+}
+
+static bool test_spi_set_speed_before_init(void)
+{
+    return spi_set_mode(MIKROBUS_1, 1000000) == -1
+        && spi_set_mode(MIKROBUS_2, 1000000) == -1;
+}
+
+static bool test_spi_transfer_before_init(void)
+{
+    uint8_t tx_buffer = 0, rx_buffer = 0;
+
+    return spi_transfer(tx_buffer, rx_buffer, 1) == -1;
+}
+
+static bool test_spi_init(void)
+{
+    if (spi_init() < 0)
+        return false;
+
+    if (spi_init() < 0)
+        return false;
+
+    return spi_get_current_bus() == MIKROBUS_1;
+}
+
+static bool test_spi_transfer_zero_byte(void)
+{
+    return spi_transfer(NULL, NULL, 0) == 0;
+}
+
+static bool test_spi_transfer_null_buffers(void)
+{
+    return spi_transfer(NULL, NULL, 1) == -1;
+}
+
+static bool read_accel_product_id(uint8_t mikrobus_index)
+{
+    int ret = -1;
+    uint8_t tx_buffer[2], rx_buffer[2];
+
+    spi_select_bus(mikrobus_index);
+    if (spi_get_current_bus() != mikrobus_index)
+        return false;
+
+    ret = ask_question("Do you have an Accel Click (SPI) ?", 15);
+    if (ret < 0)
+        return false;
+    else if (ret == 2)
+        return true;
+
+    printf("Insert your Accel Click in mikrobus %u\n", mikrobus_index+1);
+    printf("Press a switch when ready.\n");
+    if (wait_for_switch(10) < 0)
+        return false;
+
+    tx_buffer[0] = 0x80 | ADXL345_DEVICE_ID_REG;
+    tx_buffer[1] = 0;
+    if (spi_transfer(tx_buffer, rx_buffer, 2) < 0)
+        return false;
+
+    return rx_buffer[1] == ADXL345_DEVICE_ID;
+}
+
+static bool test_spi_read_id_mikrobus_1(void)
+{
+    return read_accel_product_id(MIKROBUS_1);
+}
+
+static bool test_spi_read_id_mikrobus_2(void)
+{
+    return read_accel_product_id(MIKROBUS_2);
+}
+
+static bool test_spi_release(void)
+{
+    return spi_release() == 0
+        && spi_release() == 0;
+}
+
+int main(void)
+{
+    int ret = -1;
+
+    CREATE_TEST(spi, 9);
+    ADD_TEST_CASE(spi, set_mode_before_init);
+    ADD_TEST_CASE(spi, set_speed_before_init);
+    ADD_TEST_CASE(spi, transfer_before_init);
+    ADD_TEST_CASE(spi, init);
+    ADD_TEST_CASE(spi, transfer_zero_byte);
+    ADD_TEST_CASE(spi, transfer_null_buffers);
+    ADD_TEST_CASE(spi, read_id_mikrobus_1);
+    ADD_TEST_CASE(spi, read_id_mikrobus_2);
+    ADD_TEST_CASE(spi, release);
+
+    ret = run_test(test_spi);
+    free(test_spi.cases);
+
+    return ret;
+}