initial
Dependencies: mbed BSP_DISCO_F746NG mbed-dsp
main.cpp@9:fb0eb0b2796c, 2020-03-10 (annotated)
- Committer:
- justenmg
- Date:
- Tue Mar 10 20:59:20 2020 +0000
- Revision:
- 9:fb0eb0b2796c
- Parent:
- 3:51e15bd15778
finished
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
bmazzeo | 0:c0f52e8223fe | 1 | /** |
bmazzeo | 0:c0f52e8223fe | 2 | ****************************************************************************** |
bmazzeo | 0:c0f52e8223fe | 3 | * @file main.c |
bmazzeo | 0:c0f52e8223fe | 4 | * @author Brian Mazzeo |
bmazzeo | 0:c0f52e8223fe | 5 | * @date 2020 |
bmazzeo | 0:c0f52e8223fe | 6 | * @brief This file provides a set of code for signal processing in 487. |
bmazzeo | 0:c0f52e8223fe | 7 | * Parts are taken from example code from STMIcroelectronics |
bmazzeo | 0:c0f52e8223fe | 8 | ****************************************************************************** |
bmazzeo | 0:c0f52e8223fe | 9 | * @attention |
bmazzeo | 0:c0f52e8223fe | 10 | * This code was specifically developed for BYU ECEn 487 course |
bmazzeo | 0:c0f52e8223fe | 11 | * Introduction to Digital Signal Processing. |
bmazzeo | 0:c0f52e8223fe | 12 | * |
bmazzeo | 0:c0f52e8223fe | 13 | * |
bmazzeo | 0:c0f52e8223fe | 14 | ****************************************************************************** |
bmazzeo | 0:c0f52e8223fe | 15 | */ |
bmazzeo | 0:c0f52e8223fe | 16 | |
bmazzeo | 0:c0f52e8223fe | 17 | |
bmazzeo | 0:c0f52e8223fe | 18 | #include "mbed.h" |
bmazzeo | 0:c0f52e8223fe | 19 | #include "stm32746g_discovery_audio.h" |
bmazzeo | 0:c0f52e8223fe | 20 | #include "stm32746g_discovery_sdram.h" |
bmazzeo | 0:c0f52e8223fe | 21 | #include "stm32746g_discovery_lcd.h" |
bmazzeo | 0:c0f52e8223fe | 22 | #include "arm_math.h" |
bmazzeo | 0:c0f52e8223fe | 23 | #include "signal_processing.h" |
bmazzeo | 0:c0f52e8223fe | 24 | |
bmazzeo | 0:c0f52e8223fe | 25 | /* The following type definitions are used to control the |
bmazzeo | 0:c0f52e8223fe | 26 | * buffering of the audio data using a double buffering technique. |
bmazzeo | 0:c0f52e8223fe | 27 | * Most of the transactions between the WM8994 and the microcontroller |
bmazzeo | 0:c0f52e8223fe | 28 | * are handled by other code - but this signals what the buffering state |
bmazzeo | 0:c0f52e8223fe | 29 | * is, so the data can be appropriately processed. */ |
bmazzeo | 0:c0f52e8223fe | 30 | typedef enum { |
bmazzeo | 0:c0f52e8223fe | 31 | BUFFER_OFFSET_NONE = 0, |
bmazzeo | 0:c0f52e8223fe | 32 | BUFFER_OFFSET_HALF = 1, |
bmazzeo | 0:c0f52e8223fe | 33 | BUFFER_OFFSET_FULL = 2, |
bmazzeo | 0:c0f52e8223fe | 34 | } BUFFER_StateTypeDef; |
bmazzeo | 0:c0f52e8223fe | 35 | |
bmazzeo | 0:c0f52e8223fe | 36 | /* These audio block samples define the size of the buffering */ |
bmazzeo | 0:c0f52e8223fe | 37 | #define AUDIO_BLOCK_SAMPLES ((uint32_t)128) // Number of samples (L and R) in audio block (each samples is 16 bits) |
bmazzeo | 0:c0f52e8223fe | 38 | #define AUDIO_BLOCK_SIZE ((uint32_t)512) // Number of bytes in audio block (4 * AUDIO_BLOCK_SAMPLES) |
bmazzeo | 0:c0f52e8223fe | 39 | |
bmazzeo | 0:c0f52e8223fe | 40 | /* These RAM addresses are important to determine where the audio data is stored. */ |
bmazzeo | 0:c0f52e8223fe | 41 | #define SDRAM_DEVICE_ADDR_AUDIO_MEM ((uint32_t)0xC0400000) |
bmazzeo | 0:c0f52e8223fe | 42 | #define AUDIO_BUFFER_IN SDRAM_DEVICE_ADDR_AUDIO_MEM |
bmazzeo | 0:c0f52e8223fe | 43 | #define AUDIO_BUFFER_OUT (AUDIO_BUFFER_IN + (AUDIO_BLOCK_SIZE * 2)) |
bmazzeo | 0:c0f52e8223fe | 44 | |
bmazzeo | 0:c0f52e8223fe | 45 | /* These definitions define the size of the oscilloscope that is used to display data. */ |
bmazzeo | 0:c0f52e8223fe | 46 | #define OSC_START_X_POS 20 |
bmazzeo | 0:c0f52e8223fe | 47 | #define OSC_LINE_SIZE 256 |
bmazzeo | 0:c0f52e8223fe | 48 | #define OSC_Y_POS 130 |
bmazzeo | 0:c0f52e8223fe | 49 | #define AUDIO_DRAW_LIMIT 50 |
bmazzeo | 0:c0f52e8223fe | 50 | |
bmazzeo | 0:c0f52e8223fe | 51 | /* This define a timer that is then used to record the timing of the different processing stages. */ |
bmazzeo | 0:c0f52e8223fe | 52 | Timer timer; |
bmazzeo | 0:c0f52e8223fe | 53 | |
bmazzeo | 0:c0f52e8223fe | 54 | /* This variable is important because it define the audio buffer recording state. */ |
bmazzeo | 0:c0f52e8223fe | 55 | volatile uint32_t audio_rec_buffer_state = BUFFER_OFFSET_NONE; |
bmazzeo | 0:c0f52e8223fe | 56 | |
bmazzeo | 0:c0f52e8223fe | 57 | /* Function declarations */ |
bmazzeo | 0:c0f52e8223fe | 58 | static void Erase_Trace(uint16_t Xpos, uint16_t Ypos, uint16_t Length); |
bmazzeo | 0:c0f52e8223fe | 59 | static void Draw_Trace(uint16_t Xpos, uint16_t Ypos, uint16_t* Mem_start, uint16_t Length); |
bmazzeo | 0:c0f52e8223fe | 60 | static void Audio_to_Float(uint16_t* buffer_in, float32_t* L_out, float32_t* R_out, uint16_t Length); |
bmazzeo | 0:c0f52e8223fe | 61 | static void Float_to_Audio(float32_t* L_in, float32_t* R_in, uint16_t* buffer_out, uint16_t Length); |
bmazzeo | 0:c0f52e8223fe | 62 | |
bmazzeo | 0:c0f52e8223fe | 63 | /* These memory blocks are important for converting to floating point representation. */ |
bmazzeo | 0:c0f52e8223fe | 64 | float32_t L_channel_float_in[AUDIO_BLOCK_SAMPLES]; |
bmazzeo | 0:c0f52e8223fe | 65 | float32_t R_channel_float_in[AUDIO_BLOCK_SAMPLES]; |
bmazzeo | 0:c0f52e8223fe | 66 | float32_t L_channel_float_out[AUDIO_BLOCK_SAMPLES]; |
bmazzeo | 0:c0f52e8223fe | 67 | float32_t R_channel_float_out[AUDIO_BLOCK_SAMPLES]; |
bmazzeo | 0:c0f52e8223fe | 68 | float32_t *L_channel_float_in_p = &L_channel_float_in[0]; |
bmazzeo | 0:c0f52e8223fe | 69 | float32_t *R_channel_float_in_p = &R_channel_float_in[0]; |
bmazzeo | 0:c0f52e8223fe | 70 | float32_t *L_channel_float_out_p = &L_channel_float_out[0]; |
bmazzeo | 0:c0f52e8223fe | 71 | float32_t *R_channel_float_out_p = &R_channel_float_out[0]; |
bmazzeo | 0:c0f52e8223fe | 72 | |
bmazzeo | 0:c0f52e8223fe | 73 | /* These memory blocks are where the information is stored to send back out to the WM8994 chip. */ |
bmazzeo | 0:c0f52e8223fe | 74 | uint16_t Processed_audio[AUDIO_BLOCK_SAMPLES]; |
bmazzeo | 0:c0f52e8223fe | 75 | uint16_t *Processed_audio_p = &Processed_audio[0]; |
bmazzeo | 0:c0f52e8223fe | 76 | |
bmazzeo | 0:c0f52e8223fe | 77 | /* Useful variables during looping */ |
bmazzeo | 0:c0f52e8223fe | 78 | uint32_t counter = 0; // Loop counter |
bmazzeo | 0:c0f52e8223fe | 79 | char buf[40]; // Character buffer for sprintf statements to the LCD |
bmazzeo | 0:c0f52e8223fe | 80 | int first_half_time = 0; // Time of first processing block |
bmazzeo | 0:c0f52e8223fe | 81 | int second_half_time = 0; // Time of second processing block |
bmazzeo | 0:c0f52e8223fe | 82 | int total_time = 0; // Time of total loop (first and second blocks) |
bmazzeo | 0:c0f52e8223fe | 83 | |
bmazzeo | 0:c0f52e8223fe | 84 | /* Main Function */ |
bmazzeo | 0:c0f52e8223fe | 85 | int main() |
bmazzeo | 0:c0f52e8223fe | 86 | { |
bmazzeo | 0:c0f52e8223fe | 87 | /* Initialize the LCD Screen and display information */ |
bmazzeo | 0:c0f52e8223fe | 88 | BSP_LCD_Init(); |
bmazzeo | 0:c0f52e8223fe | 89 | BSP_LCD_LayerDefaultInit(LTDC_ACTIVE_LAYER, LCD_FB_START_ADDRESS); |
bmazzeo | 0:c0f52e8223fe | 90 | BSP_LCD_SelectLayer(LTDC_ACTIVE_LAYER); |
bmazzeo | 0:c0f52e8223fe | 91 | |
bmazzeo | 0:c0f52e8223fe | 92 | /* Clear the LCD and set the font to be default */ |
bmazzeo | 0:c0f52e8223fe | 93 | BSP_LCD_Clear(LCD_COLOR_BLACK); |
bmazzeo | 0:c0f52e8223fe | 94 | BSP_LCD_SetFont(&LCD_DEFAULT_FONT); |
bmazzeo | 0:c0f52e8223fe | 95 | |
bmazzeo | 0:c0f52e8223fe | 96 | /* Set the backcolor to be black and the textcolor to be orange. */ |
bmazzeo | 0:c0f52e8223fe | 97 | BSP_LCD_SetBackColor(LCD_COLOR_BLACK); |
bmazzeo | 0:c0f52e8223fe | 98 | BSP_LCD_SetTextColor(LCD_COLOR_ORANGE); |
bmazzeo | 0:c0f52e8223fe | 99 | |
bmazzeo | 0:c0f52e8223fe | 100 | /* The following are static display elements that will remain on the screen. */ |
bmazzeo | 0:c0f52e8223fe | 101 | BSP_LCD_DisplayStringAt(0, 0, (uint8_t *)"487 Demo Code (Mazzeo)", LEFT_MODE); |
bmazzeo | 0:c0f52e8223fe | 102 | |
bmazzeo | 0:c0f52e8223fe | 103 | /* Display the L and R colors for the channels */ |
bmazzeo | 0:c0f52e8223fe | 104 | BSP_LCD_SetTextColor(LCD_COLOR_BLUE); |
bmazzeo | 0:c0f52e8223fe | 105 | BSP_LCD_DisplayStringAt(0, OSC_Y_POS - 20, (uint8_t *)"L", LEFT_MODE); |
bmazzeo | 0:c0f52e8223fe | 106 | BSP_LCD_SetTextColor(LCD_COLOR_GREEN); |
bmazzeo | 0:c0f52e8223fe | 107 | BSP_LCD_DisplayStringAt(0, OSC_Y_POS, (uint8_t *)"R", LEFT_MODE); |
bmazzeo | 0:c0f52e8223fe | 108 | |
bmazzeo | 0:c0f52e8223fe | 109 | /* The following code should not be code that you need to worry about - it sets up the audio interfaces. */ |
bmazzeo | 0:c0f52e8223fe | 110 | /* Initialize the Audio Interface */ |
bmazzeo | 0:c0f52e8223fe | 111 | BSP_AUDIO_IN_OUT_Init(INPUT_DEVICE_DIGITAL_MICROPHONE_2, OUTPUT_DEVICE_HEADPHONE, DEFAULT_AUDIO_IN_FREQ, DEFAULT_AUDIO_IN_BIT_RESOLUTION, DEFAULT_AUDIO_IN_CHANNEL_NBR); |
bmazzeo | 0:c0f52e8223fe | 112 | |
bmazzeo | 0:c0f52e8223fe | 113 | /* Initialize SDRAM buffers */ |
bmazzeo | 0:c0f52e8223fe | 114 | BSP_SDRAM_Init(); |
bmazzeo | 0:c0f52e8223fe | 115 | memset((uint16_t *)AUDIO_BUFFER_IN, 0, AUDIO_BLOCK_SIZE * 2); |
bmazzeo | 0:c0f52e8223fe | 116 | memset((uint16_t *)AUDIO_BUFFER_OUT, 0, AUDIO_BLOCK_SIZE * 2); |
bmazzeo | 0:c0f52e8223fe | 117 | |
bmazzeo | 0:c0f52e8223fe | 118 | /* Start Recording */ |
bmazzeo | 0:c0f52e8223fe | 119 | if (BSP_AUDIO_IN_Record((uint16_t *)AUDIO_BUFFER_IN, AUDIO_BLOCK_SIZE) != AUDIO_OK) { printf("BSP_AUDIO_IN_Record error\n"); } |
bmazzeo | 0:c0f52e8223fe | 120 | |
bmazzeo | 0:c0f52e8223fe | 121 | /* Start Playback */ |
bmazzeo | 0:c0f52e8223fe | 122 | BSP_AUDIO_OUT_SetAudioFrameSlot(CODEC_AUDIOFRAME_SLOT_02); |
bmazzeo | 0:c0f52e8223fe | 123 | if (BSP_AUDIO_OUT_Play((uint16_t *)AUDIO_BUFFER_OUT, AUDIO_BLOCK_SIZE * 2) != AUDIO_OK) { printf("BSP_AUDIO_OUT_Play error\n"); } |
bmazzeo | 0:c0f52e8223fe | 124 | |
bmazzeo | 0:c0f52e8223fe | 125 | /* The audio interfaces are all now working. |
bmazzeo | 0:c0f52e8223fe | 126 | * Importantly - AUDIO_BUFFER_IN is the pointer to the incoming data from the WM8994 |
bmazzeo | 0:c0f52e8223fe | 127 | * AUDIO_BUFFER_OUT is the pointer to the outgoing data to the WM8994 */ |
bmazzeo | 0:c0f52e8223fe | 128 | |
bmazzeo | 0:c0f52e8223fe | 129 | |
bmazzeo | 0:c0f52e8223fe | 130 | /* Initialize signal processing filters - usually there are variables that |
bmazzeo | 0:c0f52e8223fe | 131 | * need to be set up or that there are arrays you need to precompute - this |
bmazzeo | 0:c0f52e8223fe | 132 | * function call allows you to do that. */ |
bmazzeo | 0:c0f52e8223fe | 133 | initalize_signal_processing(); |
bmazzeo | 0:c0f52e8223fe | 134 | |
bmazzeo | 0:c0f52e8223fe | 135 | /* Hardware timer starts. Set to zero */ |
bmazzeo | 0:c0f52e8223fe | 136 | timer.start(); |
bmazzeo | 0:c0f52e8223fe | 137 | |
bmazzeo | 0:c0f52e8223fe | 138 | /* Main signal processing while loop */ |
bmazzeo | 0:c0f52e8223fe | 139 | while (1) { |
bmazzeo | 0:c0f52e8223fe | 140 | |
bmazzeo | 0:c0f52e8223fe | 141 | /* First Half */ |
bmazzeo | 0:c0f52e8223fe | 142 | /* Wait until end of half block recording before going on in the first half cycle*/ |
bmazzeo | 0:c0f52e8223fe | 143 | while (audio_rec_buffer_state != BUFFER_OFFSET_HALF) {} |
bmazzeo | 0:c0f52e8223fe | 144 | |
bmazzeo | 0:c0f52e8223fe | 145 | /* This captures the time of an entire cycle */ |
bmazzeo | 0:c0f52e8223fe | 146 | total_time = timer.read_us(); |
bmazzeo | 0:c0f52e8223fe | 147 | |
bmazzeo | 0:c0f52e8223fe | 148 | /* Reset the timer counter to zero */ |
bmazzeo | 0:c0f52e8223fe | 149 | timer.reset(); |
bmazzeo | 0:c0f52e8223fe | 150 | |
bmazzeo | 0:c0f52e8223fe | 151 | /* Plot traces of first half block recording */ |
bmazzeo | 0:c0f52e8223fe | 152 | Erase_Trace(OSC_START_X_POS, OSC_Y_POS, AUDIO_BLOCK_SAMPLES); |
bmazzeo | 0:c0f52e8223fe | 153 | Draw_Trace(OSC_START_X_POS, OSC_Y_POS, (uint16_t *) AUDIO_BUFFER_IN, AUDIO_BLOCK_SAMPLES); |
bmazzeo | 0:c0f52e8223fe | 154 | |
bmazzeo | 0:c0f52e8223fe | 155 | /* Convert data to floating point representation for processing */ |
bmazzeo | 0:c0f52e8223fe | 156 | Audio_to_Float((uint16_t *) AUDIO_BUFFER_IN, L_channel_float_in_p, R_channel_float_in_p, AUDIO_BLOCK_SAMPLES); |
bmazzeo | 0:c0f52e8223fe | 157 | |
bmazzeo | 0:c0f52e8223fe | 158 | /* ------------------------------------------------------------------------ */ |
bmazzeo | 0:c0f52e8223fe | 159 | /* Here is where signal processing can be done on the floating point arrays */ |
bmazzeo | 0:c0f52e8223fe | 160 | |
bmazzeo | 0:c0f52e8223fe | 161 | process_audio_channel_signals(L_channel_float_in_p, R_channel_float_in_p, L_channel_float_out_p, R_channel_float_out_p, AUDIO_BLOCK_SAMPLES); |
bmazzeo | 0:c0f52e8223fe | 162 | |
bmazzeo | 0:c0f52e8223fe | 163 | /* Here is where signal processing can end on the floating point arrays */ |
bmazzeo | 0:c0f52e8223fe | 164 | /* -------------------------------------------------------------------- */ |
bmazzeo | 0:c0f52e8223fe | 165 | |
bmazzeo | 0:c0f52e8223fe | 166 | /* Covert floating point data back to fixed point audio format */ |
bmazzeo | 0:c0f52e8223fe | 167 | Float_to_Audio(L_channel_float_out_p, R_channel_float_out_p, (uint16_t *) Processed_audio, AUDIO_BLOCK_SAMPLES); |
bmazzeo | 0:c0f52e8223fe | 168 | |
bmazzeo | 0:c0f52e8223fe | 169 | /* Copy recorded 1st half block into the audio buffer that goes out */ |
bmazzeo | 0:c0f52e8223fe | 170 | /* Replace the second memcpy with this first one once you have worked out the processed audio functions. */ |
bmazzeo | 0:c0f52e8223fe | 171 | memcpy((uint16_t *)(AUDIO_BUFFER_OUT), (uint16_t *)(Processed_audio), AUDIO_BLOCK_SIZE); |
bmazzeo | 0:c0f52e8223fe | 172 | //memcpy((uint16_t *)(AUDIO_BUFFER_OUT), (uint16_t *)(AUDIO_BUFFER_IN), AUDIO_BLOCK_SIZE); |
bmazzeo | 0:c0f52e8223fe | 173 | |
bmazzeo | 0:c0f52e8223fe | 174 | /* Display useful cycle information (split up information display so the processing is more balanced) */ |
bmazzeo | 0:c0f52e8223fe | 175 | sprintf(buf, "Cycles: %9d", counter); |
bmazzeo | 0:c0f52e8223fe | 176 | BSP_LCD_SetTextColor(LCD_COLOR_RED); |
bmazzeo | 0:c0f52e8223fe | 177 | BSP_LCD_DisplayStringAt(0, 46, (uint8_t *) buf, LEFT_MODE); |
bmazzeo | 0:c0f52e8223fe | 178 | |
bmazzeo | 0:c0f52e8223fe | 179 | |
bmazzeo | 0:c0f52e8223fe | 180 | /* Capture the timing of the first half processing */ |
bmazzeo | 0:c0f52e8223fe | 181 | first_half_time = timer.read_us(); |
bmazzeo | 0:c0f52e8223fe | 182 | /* End First Half */ |
bmazzeo | 0:c0f52e8223fe | 183 | |
bmazzeo | 0:c0f52e8223fe | 184 | /* Second Half */ |
bmazzeo | 0:c0f52e8223fe | 185 | /* Wait end of one block recording */ |
bmazzeo | 0:c0f52e8223fe | 186 | while (audio_rec_buffer_state != BUFFER_OFFSET_FULL) {} |
bmazzeo | 0:c0f52e8223fe | 187 | |
bmazzeo | 0:c0f52e8223fe | 188 | /* Plot traces of second half block recording */ |
bmazzeo | 0:c0f52e8223fe | 189 | Erase_Trace(OSC_START_X_POS+AUDIO_BLOCK_SAMPLES, OSC_Y_POS, AUDIO_BLOCK_SAMPLES); |
bmazzeo | 0:c0f52e8223fe | 190 | Draw_Trace( OSC_START_X_POS+AUDIO_BLOCK_SAMPLES, OSC_Y_POS, (uint16_t *) (AUDIO_BUFFER_IN + (AUDIO_BLOCK_SIZE)), AUDIO_BLOCK_SAMPLES); |
bmazzeo | 0:c0f52e8223fe | 191 | |
bmazzeo | 0:c0f52e8223fe | 192 | /* Convert data to floating point representation for processing */ |
bmazzeo | 0:c0f52e8223fe | 193 | Audio_to_Float((uint16_t *) (AUDIO_BUFFER_IN + (AUDIO_BLOCK_SIZE)), L_channel_float_in_p, R_channel_float_in_p, AUDIO_BLOCK_SAMPLES); |
bmazzeo | 0:c0f52e8223fe | 194 | |
bmazzeo | 0:c0f52e8223fe | 195 | /* ------------------------------------------------------------------------ */ |
bmazzeo | 0:c0f52e8223fe | 196 | /* Here is where signal processing can be done on the floating point arrays */ |
bmazzeo | 0:c0f52e8223fe | 197 | |
bmazzeo | 0:c0f52e8223fe | 198 | process_audio_channel_signals(L_channel_float_in_p, R_channel_float_in_p, L_channel_float_out_p, R_channel_float_out_p, AUDIO_BLOCK_SAMPLES); |
bmazzeo | 0:c0f52e8223fe | 199 | |
bmazzeo | 0:c0f52e8223fe | 200 | /* Here is where signal processing can end on the floating point arrays */ |
bmazzeo | 0:c0f52e8223fe | 201 | /* -------------------------------------------------------------------- */ |
bmazzeo | 0:c0f52e8223fe | 202 | |
bmazzeo | 0:c0f52e8223fe | 203 | /* Covert floating point data back to fixed point audio format */ |
bmazzeo | 0:c0f52e8223fe | 204 | Float_to_Audio(L_channel_float_out_p, R_channel_float_out_p, (uint16_t *) Processed_audio, AUDIO_BLOCK_SAMPLES); |
bmazzeo | 0:c0f52e8223fe | 205 | |
bmazzeo | 0:c0f52e8223fe | 206 | /* Copy recorded 2nd half block into the audio buffer that goes out */ |
bmazzeo | 0:c0f52e8223fe | 207 | memcpy((uint16_t *)(AUDIO_BUFFER_OUT + (AUDIO_BLOCK_SIZE)), (uint16_t *) (Processed_audio), AUDIO_BLOCK_SIZE); |
bmazzeo | 0:c0f52e8223fe | 208 | //memcpy((uint16_t *)(AUDIO_BUFFER_OUT + (AUDIO_BLOCK_SIZE)), (uint16_t *)(AUDIO_BUFFER_IN + (AUDIO_BLOCK_SIZE)), AUDIO_BLOCK_SIZE); |
bmazzeo | 0:c0f52e8223fe | 209 | |
bmazzeo | 0:c0f52e8223fe | 210 | |
bmazzeo | 0:c0f52e8223fe | 211 | /* Compute important cycle information and display it*/ |
bmazzeo | 0:c0f52e8223fe | 212 | sprintf(buf, "1:%6d 2:%6d T:%6d", first_half_time, second_half_time, total_time); |
bmazzeo | 0:c0f52e8223fe | 213 | BSP_LCD_SetTextColor(LCD_COLOR_RED); |
bmazzeo | 0:c0f52e8223fe | 214 | BSP_LCD_DisplayStringAt(0, 20, (uint8_t *) buf, LEFT_MODE); |
bmazzeo | 0:c0f52e8223fe | 215 | |
bmazzeo | 0:c0f52e8223fe | 216 | /* Copy recorded 2nd half block into audio output buffer */ |
bmazzeo | 0:c0f52e8223fe | 217 | |
bmazzeo | 0:c0f52e8223fe | 218 | /* Change the recording buffer state to reflect the status of the buffer */ |
bmazzeo | 0:c0f52e8223fe | 219 | audio_rec_buffer_state = BUFFER_OFFSET_NONE; |
bmazzeo | 0:c0f52e8223fe | 220 | |
bmazzeo | 0:c0f52e8223fe | 221 | /* Increase the counter */ |
bmazzeo | 0:c0f52e8223fe | 222 | counter++; |
bmazzeo | 0:c0f52e8223fe | 223 | |
bmazzeo | 0:c0f52e8223fe | 224 | /* Measures the amount of time to process the second half */ |
bmazzeo | 0:c0f52e8223fe | 225 | second_half_time = timer.read_us(); |
bmazzeo | 0:c0f52e8223fe | 226 | |
bmazzeo | 0:c0f52e8223fe | 227 | /* End Second Half */ |
bmazzeo | 0:c0f52e8223fe | 228 | } |
bmazzeo | 0:c0f52e8223fe | 229 | } |
bmazzeo | 0:c0f52e8223fe | 230 | |
bmazzeo | 0:c0f52e8223fe | 231 | /** |
bmazzeo | 0:c0f52e8223fe | 232 | * @brief Draws a trace of the data line. |
bmazzeo | 0:c0f52e8223fe | 233 | * @param Xpos: X position |
bmazzeo | 0:c0f52e8223fe | 234 | * @param Ypos: Y position |
bmazzeo | 0:c0f52e8223fe | 235 | * @param Mem_start: Start of memory location |
bmazzeo | 0:c0f52e8223fe | 236 | * @param Length: length of trace |
bmazzeo | 0:c0f52e8223fe | 237 | * @retval None |
bmazzeo | 0:c0f52e8223fe | 238 | */ |
bmazzeo | 0:c0f52e8223fe | 239 | void Erase_Trace(uint16_t Xpos, uint16_t Ypos, uint16_t Length) |
bmazzeo | 0:c0f52e8223fe | 240 | { |
bmazzeo | 0:c0f52e8223fe | 241 | /* Creates a brown rectangle above and below the axis */ |
bmazzeo | 0:c0f52e8223fe | 242 | BSP_LCD_SetTextColor(LCD_COLOR_BROWN); |
bmazzeo | 0:c0f52e8223fe | 243 | BSP_LCD_FillRect(Xpos, Ypos - AUDIO_DRAW_LIMIT, Length, AUDIO_DRAW_LIMIT); |
bmazzeo | 0:c0f52e8223fe | 244 | BSP_LCD_FillRect(Xpos, Ypos+1, Length, AUDIO_DRAW_LIMIT); |
bmazzeo | 0:c0f52e8223fe | 245 | |
bmazzeo | 0:c0f52e8223fe | 246 | /* Draw axis for plotting */ |
bmazzeo | 0:c0f52e8223fe | 247 | BSP_LCD_SetTextColor(LCD_COLOR_WHITE); |
bmazzeo | 0:c0f52e8223fe | 248 | BSP_LCD_DrawHLine(Xpos, Ypos, Length); |
bmazzeo | 0:c0f52e8223fe | 249 | |
bmazzeo | 0:c0f52e8223fe | 250 | } |
bmazzeo | 0:c0f52e8223fe | 251 | |
bmazzeo | 0:c0f52e8223fe | 252 | |
bmazzeo | 0:c0f52e8223fe | 253 | /** |
bmazzeo | 0:c0f52e8223fe | 254 | * @brief Draws a trace of the data line. |
bmazzeo | 0:c0f52e8223fe | 255 | * @param Xpos: X position |
bmazzeo | 0:c0f52e8223fe | 256 | * @param Ypos: Y position |
bmazzeo | 0:c0f52e8223fe | 257 | * @param Mem_start: Start of memory location |
bmazzeo | 0:c0f52e8223fe | 258 | * @param Length: length of trace |
bmazzeo | 0:c0f52e8223fe | 259 | * @retval None |
bmazzeo | 0:c0f52e8223fe | 260 | */ |
bmazzeo | 0:c0f52e8223fe | 261 | void Draw_Trace(uint16_t Xpos, uint16_t Ypos, uint16_t* Mem_start, uint16_t Length) |
bmazzeo | 0:c0f52e8223fe | 262 | { |
bmazzeo | 0:c0f52e8223fe | 263 | uint16_t i; |
bmazzeo | 0:c0f52e8223fe | 264 | uint16_t* mem_address; |
justenmg | 3:51e15bd15778 | 265 | //char buf[10]; |
bmazzeo | 0:c0f52e8223fe | 266 | int16_t L_audio_value; |
bmazzeo | 0:c0f52e8223fe | 267 | int16_t R_audio_value; |
bmazzeo | 0:c0f52e8223fe | 268 | |
bmazzeo | 0:c0f52e8223fe | 269 | mem_address = Mem_start; |
bmazzeo | 0:c0f52e8223fe | 270 | |
bmazzeo | 0:c0f52e8223fe | 271 | for (i=0; i<Length; i++) |
bmazzeo | 0:c0f52e8223fe | 272 | { |
bmazzeo | 0:c0f52e8223fe | 273 | R_audio_value = (int16_t) *mem_address; |
bmazzeo | 0:c0f52e8223fe | 274 | mem_address++; |
bmazzeo | 0:c0f52e8223fe | 275 | L_audio_value = (int16_t) *mem_address; |
bmazzeo | 0:c0f52e8223fe | 276 | mem_address++; |
bmazzeo | 0:c0f52e8223fe | 277 | |
bmazzeo | 0:c0f52e8223fe | 278 | L_audio_value = L_audio_value / 100; |
bmazzeo | 0:c0f52e8223fe | 279 | R_audio_value = R_audio_value / 100; |
bmazzeo | 0:c0f52e8223fe | 280 | |
bmazzeo | 0:c0f52e8223fe | 281 | if (L_audio_value > AUDIO_DRAW_LIMIT) {L_audio_value = AUDIO_DRAW_LIMIT;} |
bmazzeo | 0:c0f52e8223fe | 282 | else if (L_audio_value < -AUDIO_DRAW_LIMIT) {L_audio_value = -AUDIO_DRAW_LIMIT;} |
bmazzeo | 0:c0f52e8223fe | 283 | |
bmazzeo | 0:c0f52e8223fe | 284 | if (R_audio_value > AUDIO_DRAW_LIMIT) {R_audio_value = AUDIO_DRAW_LIMIT;} |
bmazzeo | 0:c0f52e8223fe | 285 | else if (R_audio_value < -AUDIO_DRAW_LIMIT) {R_audio_value = -AUDIO_DRAW_LIMIT;} |
bmazzeo | 0:c0f52e8223fe | 286 | |
bmazzeo | 0:c0f52e8223fe | 287 | BSP_LCD_DrawPixel(Xpos + i, (uint16_t) ((int16_t) Ypos + L_audio_value), LCD_COLOR_BLUE); |
bmazzeo | 0:c0f52e8223fe | 288 | BSP_LCD_DrawPixel(Xpos + i, (uint16_t) ((int16_t) Ypos + R_audio_value), LCD_COLOR_GREEN); |
bmazzeo | 0:c0f52e8223fe | 289 | } |
bmazzeo | 0:c0f52e8223fe | 290 | |
bmazzeo | 0:c0f52e8223fe | 291 | } |
bmazzeo | 0:c0f52e8223fe | 292 | |
bmazzeo | 0:c0f52e8223fe | 293 | /** |
bmazzeo | 0:c0f52e8223fe | 294 | * @brief Converts audio data in buffer to floating point representation. |
bmazzeo | 0:c0f52e8223fe | 295 | * @param buffer_in: Pointer to Audio buffer start location |
bmazzeo | 0:c0f52e8223fe | 296 | * @param L_out: Pointer to Left channel out data (float32_t) |
bmazzeo | 0:c0f52e8223fe | 297 | * @param R_out: Pointer to Right channel out data (float32_t) |
bmazzeo | 0:c0f52e8223fe | 298 | * @param Length: length of data to convert |
bmazzeo | 0:c0f52e8223fe | 299 | * @retval None |
bmazzeo | 0:c0f52e8223fe | 300 | */ |
bmazzeo | 0:c0f52e8223fe | 301 | void Audio_to_Float(uint16_t* buffer_in, float32_t* L_out, float32_t* R_out, uint16_t Length) |
bmazzeo | 0:c0f52e8223fe | 302 | { |
bmazzeo | 0:c0f52e8223fe | 303 | uint16_t i; |
bmazzeo | 0:c0f52e8223fe | 304 | uint16_t* audio_mem_address; |
bmazzeo | 0:c0f52e8223fe | 305 | float32_t* L_chan_mem_address; |
bmazzeo | 0:c0f52e8223fe | 306 | float32_t* R_chan_mem_address; |
bmazzeo | 0:c0f52e8223fe | 307 | float32_t L_audio_value; |
bmazzeo | 0:c0f52e8223fe | 308 | float32_t R_audio_value; |
bmazzeo | 0:c0f52e8223fe | 309 | |
bmazzeo | 0:c0f52e8223fe | 310 | audio_mem_address = buffer_in; |
bmazzeo | 0:c0f52e8223fe | 311 | L_chan_mem_address = L_out; |
bmazzeo | 0:c0f52e8223fe | 312 | R_chan_mem_address = R_out; |
bmazzeo | 0:c0f52e8223fe | 313 | |
bmazzeo | 0:c0f52e8223fe | 314 | for (i=0; i<Length; i++) |
bmazzeo | 0:c0f52e8223fe | 315 | { |
bmazzeo | 0:c0f52e8223fe | 316 | R_audio_value = (float32_t) ((int16_t) *audio_mem_address); |
bmazzeo | 0:c0f52e8223fe | 317 | audio_mem_address++; |
bmazzeo | 0:c0f52e8223fe | 318 | L_audio_value = (float32_t) ((int16_t) *audio_mem_address); |
bmazzeo | 0:c0f52e8223fe | 319 | audio_mem_address++; |
bmazzeo | 0:c0f52e8223fe | 320 | |
bmazzeo | 0:c0f52e8223fe | 321 | *L_chan_mem_address = L_audio_value; |
bmazzeo | 0:c0f52e8223fe | 322 | L_chan_mem_address++; |
bmazzeo | 0:c0f52e8223fe | 323 | |
bmazzeo | 0:c0f52e8223fe | 324 | *R_chan_mem_address = R_audio_value; |
bmazzeo | 0:c0f52e8223fe | 325 | R_chan_mem_address++; |
bmazzeo | 0:c0f52e8223fe | 326 | } |
bmazzeo | 0:c0f52e8223fe | 327 | } |
bmazzeo | 0:c0f52e8223fe | 328 | |
bmazzeo | 0:c0f52e8223fe | 329 | /** |
bmazzeo | 0:c0f52e8223fe | 330 | * @brief Converts audio data in buffer to floating point representation. |
bmazzeo | 0:c0f52e8223fe | 331 | * @param L_out: Pointer to Left channel in data (float32_t) |
bmazzeo | 0:c0f52e8223fe | 332 | * @param R_out: Pointer to Right channel in data (float32_t) |
bmazzeo | 0:c0f52e8223fe | 333 | * @param buffer_out: Pointer to combined 32 bit (two 16-bit int samples) |
bmazzeo | 0:c0f52e8223fe | 334 | * @param Length: length of data to convert |
bmazzeo | 0:c0f52e8223fe | 335 | * @retval None |
bmazzeo | 0:c0f52e8223fe | 336 | */ |
bmazzeo | 0:c0f52e8223fe | 337 | void Float_to_Audio(float32_t* L_in, float32_t* R_in, uint16_t* buffer_out, uint16_t Length) |
bmazzeo | 0:c0f52e8223fe | 338 | { |
bmazzeo | 0:c0f52e8223fe | 339 | uint16_t i; |
bmazzeo | 0:c0f52e8223fe | 340 | uint16_t* audio_mem_address; |
bmazzeo | 0:c0f52e8223fe | 341 | float32_t* L_chan_mem_address; |
bmazzeo | 0:c0f52e8223fe | 342 | float32_t* R_chan_mem_address; |
bmazzeo | 0:c0f52e8223fe | 343 | int16_t L_audio_value; |
bmazzeo | 0:c0f52e8223fe | 344 | int16_t R_audio_value; |
bmazzeo | 0:c0f52e8223fe | 345 | |
bmazzeo | 0:c0f52e8223fe | 346 | audio_mem_address = buffer_out; |
bmazzeo | 0:c0f52e8223fe | 347 | L_chan_mem_address = L_in; |
bmazzeo | 0:c0f52e8223fe | 348 | R_chan_mem_address = R_in; |
bmazzeo | 0:c0f52e8223fe | 349 | |
bmazzeo | 0:c0f52e8223fe | 350 | for (i=0; i<Length; i++) |
bmazzeo | 0:c0f52e8223fe | 351 | { |
bmazzeo | 0:c0f52e8223fe | 352 | L_audio_value = (int16_t) ((float32_t) *L_chan_mem_address); |
bmazzeo | 0:c0f52e8223fe | 353 | L_chan_mem_address++; |
bmazzeo | 0:c0f52e8223fe | 354 | |
bmazzeo | 0:c0f52e8223fe | 355 | R_audio_value = (int16_t) ((float32_t) *R_chan_mem_address); |
bmazzeo | 0:c0f52e8223fe | 356 | R_chan_mem_address++; |
bmazzeo | 0:c0f52e8223fe | 357 | |
bmazzeo | 0:c0f52e8223fe | 358 | *audio_mem_address = (uint16_t) R_audio_value; |
bmazzeo | 0:c0f52e8223fe | 359 | audio_mem_address++; |
bmazzeo | 0:c0f52e8223fe | 360 | *audio_mem_address = (uint16_t) L_audio_value; |
bmazzeo | 0:c0f52e8223fe | 361 | audio_mem_address++; |
bmazzeo | 0:c0f52e8223fe | 362 | } |
bmazzeo | 0:c0f52e8223fe | 363 | } |
bmazzeo | 0:c0f52e8223fe | 364 | |
bmazzeo | 0:c0f52e8223fe | 365 | |
bmazzeo | 0:c0f52e8223fe | 366 | |
bmazzeo | 0:c0f52e8223fe | 367 | |
bmazzeo | 0:c0f52e8223fe | 368 | |
bmazzeo | 0:c0f52e8223fe | 369 | /*------------------------------------------------------------------------------------- |
bmazzeo | 0:c0f52e8223fe | 370 | Callbacks implementation: |
bmazzeo | 0:c0f52e8223fe | 371 | the callbacks API are defined __weak in the stm32746g_discovery_audio.c file |
bmazzeo | 0:c0f52e8223fe | 372 | and their implementation should be done in the user code if they are needed. |
bmazzeo | 0:c0f52e8223fe | 373 | Below some examples of callback implementations. |
bmazzeo | 0:c0f52e8223fe | 374 | -------------------------------------------------------------------------------------*/ |
bmazzeo | 0:c0f52e8223fe | 375 | /** |
bmazzeo | 0:c0f52e8223fe | 376 | * @brief Manages the DMA Transfer complete interrupt. |
bmazzeo | 0:c0f52e8223fe | 377 | * @param None |
bmazzeo | 0:c0f52e8223fe | 378 | * @retval None |
bmazzeo | 0:c0f52e8223fe | 379 | */ |
bmazzeo | 0:c0f52e8223fe | 380 | void BSP_AUDIO_IN_TransferComplete_CallBack(void) |
bmazzeo | 0:c0f52e8223fe | 381 | { |
bmazzeo | 0:c0f52e8223fe | 382 | audio_rec_buffer_state = BUFFER_OFFSET_FULL; |
bmazzeo | 0:c0f52e8223fe | 383 | } |
bmazzeo | 0:c0f52e8223fe | 384 | |
bmazzeo | 0:c0f52e8223fe | 385 | /** |
bmazzeo | 0:c0f52e8223fe | 386 | * @brief Manages the DMA Half Transfer complete interrupt. |
bmazzeo | 0:c0f52e8223fe | 387 | * @param None |
bmazzeo | 0:c0f52e8223fe | 388 | * @retval None |
bmazzeo | 0:c0f52e8223fe | 389 | */ |
bmazzeo | 0:c0f52e8223fe | 390 | void BSP_AUDIO_IN_HalfTransfer_CallBack(void) |
bmazzeo | 0:c0f52e8223fe | 391 | { |
bmazzeo | 0:c0f52e8223fe | 392 | audio_rec_buffer_state = BUFFER_OFFSET_HALF; |
bmazzeo | 0:c0f52e8223fe | 393 | } |
bmazzeo | 0:c0f52e8223fe | 394 | |
bmazzeo | 0:c0f52e8223fe | 395 | /** |
bmazzeo | 0:c0f52e8223fe | 396 | * @brief Audio IN Error callback function. |
bmazzeo | 0:c0f52e8223fe | 397 | * @param None |
bmazzeo | 0:c0f52e8223fe | 398 | * @retval None |
bmazzeo | 0:c0f52e8223fe | 399 | */ |
bmazzeo | 0:c0f52e8223fe | 400 | void BSP_AUDIO_IN_Error_CallBack(void) |
bmazzeo | 0:c0f52e8223fe | 401 | { |
bmazzeo | 0:c0f52e8223fe | 402 | printf("BSP_AUDIO_IN_Error_CallBack\n"); |
bmazzeo | 0:c0f52e8223fe | 403 | } |