driver_mcp3421_basic.c

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#include "driver_mcp3421_basic.h"
 
static mcp3421_handle_t gs_handle;        

uint8_t mcp3421_basic_init(void)
{
    uint8_t res;
    
    /* link interface function */
    DRIVER_MCP3421_LINK_INIT(&gs_handle, mcp3421_handle_t); 
    DRIVER_MCP3421_LINK_IIC_INIT(&gs_handle, mcp3421_interface_iic_init);
    DRIVER_MCP3421_LINK_IIC_DEINIT(&gs_handle, mcp3421_interface_iic_deinit);
    DRIVER_MCP3421_LINK_IIC_READ_COMMAND(&gs_handle, mcp3421_interface_iic_read_cmd);
    DRIVER_MCP3421_LINK_IIC_WRITE_COMMAND(&gs_handle, mcp3421_interface_iic_write_cmd);
    DRIVER_MCP3421_LINK_DELAY_MS(&gs_handle, mcp3421_interface_delay_ms);
    DRIVER_MCP3421_LINK_DEBUG_PRINT(&gs_handle, mcp3421_interface_debug_print);
    
    /* mcp3421 init */
    res = mcp3421_init(&gs_handle);
    if (res != 0)
    {
        mcp3421_interface_debug_print("mcp3421: init failed.\n");
        
        return 1;
    }
    
    /* set default pag */
    res = mcp3421_set_pga(&gs_handle, MCP3421_BASIC_DEFAULT_PGA);
    if (res != 0)
    {
        mcp3421_interface_debug_print("mcp3421: set pga failed.\n");
        (void)mcp3421_deinit(&gs_handle);
        
        return 1;
    }
    
    /* set default adc bit */
    res = mcp3421_set_adc_bit(&gs_handle, MCP3421_BASIC_DEFAULT_BIT);
    if (res != 0)
    {
        mcp3421_interface_debug_print("mcp3421: set adc bit failed.\n");
        (void)mcp3421_deinit(&gs_handle);
        
        return 1;
    }
    
    /* start continuous read */
    res = mcp3421_start_continuous_read(&gs_handle);
    if (res != 0)
    {
        mcp3421_interface_debug_print("mcp3421: start continues read mode failed.\n");
        (void)mcp3421_deinit(&gs_handle);
        
        return 1;
    }
 
    return 0;
}

uint8_t mcp3421_basic_read(double *s)
{
    int32_t raw;
  
    /* read data */
    if (mcp3421_continuous_read(&gs_handle, (int32_t *)&raw, s) != 0)
    {
        return 1;
    }
    
    return 0;
}

uint8_t mcp3421_basic_deinit(void)
{
    uint8_t res;
    
    /* stop continuous read */
    res = mcp3421_stop_continuous_read(&gs_handle);
    if (res != 0)
    {
        return 1;
    }
    
    /* deinit mcp3421 */
    res = mcp3421_deinit(&gs_handle);
    if (res != 0)
    {
        return 1;
    }
    
    return 0;
}