Hello World for SSIF. I2S master write.

Dependencies:   R_BSP mbed-rtos mbed

Embed: (wiki syntax)

« Back to documentation index

Show/hide line numbers main.cpp Source File

main.cpp

00001 #include "mbed.h"
00002 #include "R_BSP_Ssif.h"
00003 #include "sine_data_tbl.h"
00004 
00005 //I2S send only, The upper limit of write buffer is 8.
00006 R_BSP_Ssif ssif(P4_4, P4_5, P4_7, P4_6, 0x80, 8, 0);
00007 
00008 static void callback_ssif_write_end(void * p_data, int32_t result, void * p_app_data) {
00009     if (result < 0) {
00010         printf("ssif write callback error %d\n", result);
00011     }
00012 }
00013 
00014 int main() {
00015     rbsp_data_conf_t   ssif_write_end_conf = {&callback_ssif_write_end, NULL};
00016     ssif_channel_cfg_t ssif_cfg;
00017     int32_t            result;
00018 
00019     //I2S Master, 44.1kHz, 16bit, 2ch
00020     ssif_cfg.enabled                = true;
00021     ssif_cfg.int_level              = 0x78;
00022     ssif_cfg.slave_mode             = false;
00023     ssif_cfg.sample_freq            = 44100u;
00024     ssif_cfg.clk_select             = SSIF_CFG_CKS_AUDIO_X1;
00025     ssif_cfg.multi_ch               = SSIF_CFG_MULTI_CH_1;
00026     ssif_cfg.data_word              = SSIF_CFG_DATA_WORD_16;
00027     ssif_cfg.system_word            = SSIF_CFG_SYSTEM_WORD_32;
00028     ssif_cfg.bclk_pol               = SSIF_CFG_FALLING;
00029     ssif_cfg.ws_pol                 = SSIF_CFG_WS_LOW;
00030     ssif_cfg.padding_pol            = SSIF_CFG_PADDING_LOW;
00031     ssif_cfg.serial_alignment       = SSIF_CFG_DATA_FIRST;
00032     ssif_cfg.parallel_alignment     = SSIF_CFG_LEFT;
00033     ssif_cfg.ws_delay               = SSIF_CFG_DELAY;
00034     ssif_cfg.noise_cancel           = SSIF_CFG_DISABLE_NOISE_CANCEL;
00035     ssif_cfg.tdm_mode               = SSIF_CFG_DISABLE_TDM;
00036     ssif_cfg.romdec_direct.mode     = SSIF_CFG_DISABLE_ROMDEC_DIRECT;
00037     ssif_cfg.romdec_direct.p_cbfunc = NULL;
00038     result = ssif.ConfigChannel(&ssif_cfg);
00039     if (result < 0) {
00040         printf("ssif config error %d\n", result);
00041     }
00042 
00043     while (1) {
00044         //The upper limit of write buffer is 8.
00045         result = ssif.write((void *)sin_data_44100Hz_16bit_2ch, 
00046                             sizeof(sin_data_44100Hz_16bit_2ch), &ssif_write_end_conf);
00047         if (result < 0) {
00048             printf("ssif write api error %d\n", result);
00049         }
00050     }
00051 }