Fix mem.c to use the address of DATA_SEGMENT_START instead of the value

1 files changed, 12 insertions, 3 deletions

diff --git a/02-usart/src/main.c b/02-usart/src/main.c
index d26dce4..b050d3e 100644
--- a/02-usart/src/main.c
+++ b/02-usart/src/main.c
@@ -81,9 +81,18 @@ int main()
     for (;;);
   }
 
-  const char* thing = "HELLO DMA!\r\n";
-  regset(USART2.ic_r, usart_tccf, 1);
-  dma_mem2p_initiate_transfer(dma_chan, thing, strlen(thing));
+  // const char* thing = "Good Thing This Works!";
+
+  char* str = halloc(128);
+  strcpy(str, "Hello, Heap!");
+
+  usart_printf(&USART2, "DATA_SEGMENT_START %p\n", &DATA_SEGMENT_START);
+  usart_printf(&USART2, "DATA_SEGMENT_STOP: %p\n", &DATA_SEGMENT_STOP);
+  usart_printf(&USART2, "str at: %p\n", str);
+  usart_printf(&USART2, "str: %s\n", str);
+  // usart_printf(&USART2, "%s\n", thing);
+  // regset(USART2.ic_r, usart_tccf, 1);
+  // dma_mem2p_initiate_transfer(dma_chan, thing, strlen(thing));
 
   __IO gpio_port_t* port_b = enable_gpio(GPIO_PORT_B);
   gpio_output_pin_t pin3 = set_gpio_pin_output(port_b, PIN_3);