other/dma2mem: Fix typos and coding-style.

examples/stm32/f1/other/dma_mem2mem/README

@@ -2,7 +2,7 @@
 README
 ------------------------------------------------------------------------------
 
-This program demonstrates a little DMA MEM2MEM transfer. A string is send out 
+This program demonstrates a little DMA MEM2MEM transfer. A string is sent out
 to USART1 and afterwards copied by DMA to another memory location. To check
 if the transfer was successful we send the destination string also out to
 USART1.

examples/stm32/f1/other/dma_mem2mem/dma.c

@@ -67,8 +67,10 @@ void my_usart_print_string(u32 usart, char * s)
 
 int main(void)
 {
-	/* Exactly 20 bytes including '0' at the end.
+	/*
-	   We want to transfer 32bit * 5 so it should fit */
+	 * Exactly 20 bytes including '\0' at the end.
+	 * We want to transfer 32bit * 5 so it should fit.
+	 */
 	char s1[20] = "Hello STM MEM2MEM\r\n";
 	char s2[20];
 
@@ -94,7 +96,10 @@ int main(void)
 	dma_set_memory_size(DMA1, DMA_CHANNEL1, DMA_CCR1_MSIZE_32BIT);
 	dma_set_peripheral_size(DMA1, DMA_CHANNEL1, DMA_CCR1_PSIZE_32BIT);
 
-	/* After each 32Bit we have to increase the addres because we use RAM. */
+	/*
+	 * After every 32bits we have to increase the address because
+	 * we use RAM.
+	 */
 	dma_enable_memory_increment_mode(DMA1, DMA_CHANNEL1);
 	dma_enable_peripheral_increment_mode(DMA1, DMA_CHANNEL1);
 
@@ -107,18 +112,19 @@ int main(void)
 	/* Destination should be string s2. */
 	dma_set_memory_address(DMA1, DMA_CHANNEL1, (u32)&s2);
 
-	/* Set number of DATA to transfer.
+	/*
-	   Remember that this means not necessary bytes but MSIZE or PSIZE
+	 * Set number of DATA to transfer.
-	   depending from your source device. */
+	 * Remember that this means not necessary bytes but MSIZE or PSIZE
+	 * depending on your source device.
+	 */
 	dma_set_number_of_data(DMA1, DMA_CHANNEL1, 5);
 
 	/* Start DMA transfer. */
 	dma_enable_channel(DMA1, DMA_CHANNEL1);
 
-	/* TODO: write a function to get the interrupt flags. */
+	/* TODO: Write a function to get the interrupt flags. */
 	while (!(DMA_ISR(DMA1) & 0x0000001))
-	{
+		;
-	}
 
 	dma_disable_channel(DMA1, DMA_CHANNEL1);
 
@@ -127,6 +133,7 @@ int main(void)
 	my_usart_print_string(USART1, s2);
 
 	gpio_clear(GPIOB, GPIO6);	/* LED2 on */
+
 	while (1); /* Halt. */
 
 	return 0;