Diff: example3.h

Revision:

19:bf3ae4c3635d

Parent:

16:cb10aec6feb1

Child:

20:01d0a680e45a

--- a/example3.h	Sat Dec 10 09:59:10 2022 +0000
+++ b/example3.h	Mon Dec 12 15:05:21 2022 +0000
@@ -1,131 +1,142 @@
 /*
- * Demonstrates capturing the GPIO P0.4 to P0.7 "nibble" to memory 
+ * Demonstrates capturing the GPIO P0.4 to P0.7 "nibble" to memory
  * using GPDMA. The transfers from port pins to memory buffer are
  * triggered using Timer1 MAT1.0 match compare.
  *
  * In this example all inputs have pullups. So with nothing connected
- * the P0.4/7 reads as 0xF. Connecting a wire from one or more of the four 
+ * the P0.4/7 reads as 0xF. Connecting a wire from one or more of the four
  * inputs to ground will show up in the captured buffer sequence.
  */
- 
 #include "mbed.h"
 #include "MODDMA.h"
-#include "iomacros.h" // within MODDMA library.
+#include "iomacros.h"   // within MODDMA library.
 
 // How long between grabbing GPIO FIO0PIN register.
+
 // Value is in microseconds. (500000 is half a second).
 #define SAMPLE_PERIOD   500000
 
 #define NUM_OF_SAMPLES  5
 
-Serial pc(USBTX, USBRX);
+DigitalOut      led1(LED1);
+DigitalOut      led2(LED2);
+DigitalOut      led3(LED3);
 
-DigitalOut led1(LED1);
-DigitalOut led2(LED2);
-DigitalOut led3(LED3);
+uint32_t        buffer[NUM_OF_SAMPLES];
 
-uint32_t buffer[NUM_OF_SAMPLES];
+bool            dmaTransferComplete;
 
-bool dmaTransferComplete;
+MODDMA          dma;
+MODDMA_Config*  conf;
 
-MODDMA dma;
-MODDMA_Config *conf;
+void            TC0_callback(void);
+void            ERR0_callback(void);
 
-void TC0_callback(void);
-void ERR0_callback(void);
+/**
+ * @brief
+ * @note
+ * @param
+ * @retval
+ */
+int main()
+{
+    volatile int    life_counter = 0;
 
-int main() {
-    volatile int life_counter = 0;
-     
     // Macros defined in iomacros.h, saves messing with DigitalIn
-    p30_AS_INPUT; p30_MODE( PIN_PULLUP ); // P0.4
-    p29_AS_INPUT; p29_MODE( PIN_PULLUP ); // P0.5
-    p8_AS_INPUT;  p8_MODE( PIN_PULLUP );  // P0.6
-    p7_AS_INPUT;  p7_MODE( PIN_PULLUP );  // P0.7
-    
+    p30_AS_INPUT;
+    p30_MODE(PIN_PULLUP);               // P0.4
+    p29_AS_INPUT;
+    p29_MODE(PIN_PULLUP);               // P0.5
+    p8_AS_INPUT;
+    p8_MODE(PIN_PULLUP);                // P0.6
+    p7_AS_INPUT;
+    p7_MODE(PIN_PULLUP);                // P0.7
+
     // Clear the buffer.
     memset(buffer, 0, sizeof(buffer));
-    
-    // Setup the serial port to print out results.
-    pc.baud(115200);
-    pc.printf("Starting up...\n");
-    
+
+    printf("Starting up...\n");
+
     // Set-up timer1 as a periodic timer.
-    LPC_SC->PCONP    |= (1UL << 2); // TIM1 On
-    LPC_SC->PCLKSEL0 |= (3UL << 4); // CCLK/8 = 12MHz
-    LPC_TIM1->PR      = 11;         // TC clocks at 1MHz.
-    LPC_TIM1->MCR     = 2;          // Reset TCR to zero on match.
-    LPC_TIM1->MR0     = SAMPLE_PERIOD;
-    
+    LPC_SC->PCONP |= (1UL << 2);        // TIM1 On
+    LPC_SC->PCLKSEL0 |= (3UL << 4);     // CCLK/8 = 12MHz
+    LPC_TIM1->PR = 11;                  // TC clocks at 1MHz.
+    LPC_TIM1->MCR = 2;                  // Reset TCR to zero on match.
+    LPC_TIM1->MR0 = SAMPLE_PERIOD;
+
     // Prepare the GPDMA system.
     conf = new MODDMA_Config;
-    conf
-     ->channelNum    ( MODDMA::Channel_0 )
-     ->srcMemAddr    ( (uint32_t)&LPC_GPIO0->FIOPIN )
-     ->dstMemAddr    ( (uint32_t)&buffer[0] )
-     ->transferSize  ( NUM_OF_SAMPLES )
-     ->transferType  ( MODDMA::g2m ) // pseudo transfer code MODDMA understands.
-     ->transferWidth ( MODDMA::word )
-     ->srcConn       ( MODDMA::MAT1_0 )
-     ->dmacSync      ( MODDMA::MAT1_0 ) 
-     ->attach_tc     ( TC0_callback )
-     ->attach_err    ( ERR0_callback )
-    ; // end conf.
-    
+    conf->channelNum(MODDMA::Channel_0);
+    conf->srcMemAddr((uint32_t) & LPC_GPIO0->FIOPIN);
+    conf->dstMemAddr((uint32_t) & buffer[0]);
+    conf->transferSize(NUM_OF_SAMPLES);
+    conf->transferType(MODDMA::g2m);    // pseudo transfer code MODDMA understands.
+    conf->transferWidth(MODDMA::word);
+    conf->srcConn(MODDMA::MAT1_0);
+    conf->dmacSync(MODDMA::MAT1_0);
+    conf->attach_tc(TC0_callback);
+    conf->attach_err(ERR0_callback);
+    ;                                   // end conf.
+
     // Prepare configuration.
-    if (!dma.Setup( conf )) {
+    if (!dma.Setup(conf)) {
         error("Doh!");
     }
-    
-    // Enable GPDMA to be ready for the TIM1 "ticks".       
-    dma.Enable( conf );
-    
+
+    // Enable GPDMA to be ready for the TIM1 "ticks".
+    dma.Enable(conf);
+
     // Begin.
     LPC_TIM1->TCR = 1;
-       
-    while (1) { 
+
+    while (1) {
         if (life_counter++ > 1000000) {
-            led1 = !led1; // Show some sort of life.
+            led1 = !led1;               // Show some sort of life.
             life_counter = 0;
         }
-        
+
         if (dmaTransferComplete) {
             dmaTransferComplete = false;
             for (int i = 0; i < NUM_OF_SAMPLES; i++) {
-                int val = (buffer[i] >> 4) & 0xF; 
-                pc.printf("Buffer index %d = 0x%x\n", i, val);
+                int val = (buffer[i] >> 4) & 0xF;
+                printf("Buffer index %d = 0x%x\n", i, val);
             }
-            pc.printf("Done.\n");
-            
+
+            printf("Done.\n");
+
             // Schedule another grab.
-            if (dma.Setup( conf )) {        
-                dma.Enable( conf );                
-            }            
+            if (dma.Setup(conf)) {
+                dma.Enable(conf);
+            }
         }
-    }       
+    }
 }
 
 // Configuration callback on TC
-void TC0_callback(void) {
-    
+void TC0_callback(void)
+{
     // Just show sample sequence grab complete.
-    led3 = !led3; 
-        
+    led3 = !led3;
+
     // Get configuration pointer.
-    MODDMA_Config *config = dma.getConfig();
-    
+    MODDMA_Config*  config = dma.getConfig();
+
     // Finish the DMA cycle by shutting down the channel.
-    dma.Disable( (MODDMA::CHANNELS)config->channelNum() );
-    
+
+    dma.Disable((MODDMA::CHANNELS) config->channelNum());
+
     // Tell main() while(1) loop to print the results.
-    dmaTransferComplete = true;            
-    
+    dmaTransferComplete = true;
+
     // Clear DMA IRQ flags.
-    if (dma.irqType() == MODDMA::TcIrq) dma.clearTcIrq();    
-    if (dma.irqType() == MODDMA::ErrIrq) dma.clearErrIrq();    
+    if (dma.irqType() == MODDMA::TcIrq)
+        dma.clearTcIrq();
+    if (dma.irqType() == MODDMA::ErrIrq)
+        dma.clearErrIrq();
 }
 
 // Configuration callback on Error
-void ERR0_callback(void) {
+void ERR0_callback(void)
+{
     error("Oh no! My Mbed EXPLODED! :( Only kidding, go find the problem");
 }