_ peu605 / Mbed 2 deprecated GPIO_TEST

GPIO toggle test on NUCLEO F411RE DigitalOut 4.46MHz, 11210msec BSRRL/BSRRH register 20.8MHz, 2402msec Bit banding 15.6MHz, 3203msec

Dependencies:   mbed

GPIO toggle test on NUCLEO F411RE

  • DigitalOut 4.46MHz, 11210msec
  • BSRRL/BSRRH register 20.8MHz, 2402msec
  • Bit banding 15.6MHz, 3203msec

Files at this revision

API Documentation at this revision

Revision 1:02a561139720, committed 2017-09-07

Comitter:
peu605
Date:
Thu Sep 07 14:53:32 2017 +0000
Parent:
0:ab159002ec37
Commit message:
change to BSRR

Changed in this revision

main.cpp Show annotated file Show diff for this revision Revisions of this file
mbed.bld Show annotated file Show diff for this revision Revisions of this file 
diff -r ab159002ec37 -r 02a561139720 main.cpp
--- a/main.cpp	Mon Jan 26 10:31:24 2015 +0000
+++ b/main.cpp	Thu Sep 07 14:53:32 2017 +0000
@@ -14,7 +14,7 @@
 #define BITBAND_PERIPH(addr, bit) \
     (volatile uint32_t*)(PERIPH_BB_BASE+((uint32_t)addr-PERIPH_BASE)*32+(bit*4))
     
-#define LOOP_COUNT 10000001
+#define LOOP_COUNT 10000000
 
 PinName pinName = D10;
 DigitalOut dout(pinName, 0);
@@ -22,7 +22,8 @@
 Serial pc(SERIAL_TX, SERIAL_RX);
 
 GPIO_TypeDef *gpio_port_reg;
-volatile uint32_t gpio_reg_mask;
+volatile uint32_t gpio_reg_set_mask;
+volatile uint32_t gpio_reg_reset_mask;
 volatile uint32_t *bb_gpio_port;
 
 void digitalOutTest();
@@ -35,7 +36,8 @@
     //set gpio port addresses and masks
     uint32_t port_index = (uint32_t) pinName >> 4;
     gpio_port_reg = (GPIO_TypeDef *) (GPIOA_BASE + (port_index << 10));
-    gpio_reg_mask = 1 << ((uint32_t) pinName & 0xf);
+    gpio_reg_set_mask = 1 << ((uint32_t) pinName & 0xf);
+    gpio_reg_reset_mask = gpio_reg_set_mask << 16;
 
     // set bit band addresses
     uint8_t port_bit = (uint32_t) pinName & 0xf;
@@ -57,7 +59,7 @@
     uint32_t l = LOOP_COUNT;
     int t1 = t.read_ms();
     
-    while(--l) {
+    while(l--) {
         dout = 1;
         dout = 0;
         dout = 1;
@@ -80,17 +82,18 @@
     uint32_t l = LOOP_COUNT;
     int t1 = t.read_ms();
 
-    while(--l) {
-        gpio_port_reg->BSRRL = gpio_reg_mask;
-        gpio_port_reg->BSRRH = gpio_reg_mask;
-        gpio_port_reg->BSRRL = gpio_reg_mask;
-        gpio_port_reg->BSRRH = gpio_reg_mask;
-        gpio_port_reg->BSRRL = gpio_reg_mask;
-        gpio_port_reg->BSRRH = gpio_reg_mask;
-        gpio_port_reg->BSRRL = gpio_reg_mask;
-        gpio_port_reg->BSRRH = gpio_reg_mask;
-        gpio_port_reg->BSRRL = gpio_reg_mask;
-        gpio_port_reg->BSRRH = gpio_reg_mask;
+//    __asm("ALIGN 4");
+    while(l--) {
+        gpio_port_reg->BSRR = gpio_reg_set_mask;
+        gpio_port_reg->BSRR = gpio_reg_reset_mask;
+        gpio_port_reg->BSRR = gpio_reg_set_mask;
+        gpio_port_reg->BSRR = gpio_reg_reset_mask;
+        gpio_port_reg->BSRR = gpio_reg_set_mask;
+        gpio_port_reg->BSRR = gpio_reg_reset_mask;
+        gpio_port_reg->BSRR = gpio_reg_set_mask;
+        gpio_port_reg->BSRR = gpio_reg_reset_mask;
+        gpio_port_reg->BSRR = gpio_reg_set_mask;
+        gpio_port_reg->BSRR = gpio_reg_reset_mask;
     }
     
     int t2 = t.read_ms();
@@ -103,7 +106,8 @@
     uint32_t l = LOOP_COUNT;
     int t1 = t.read_ms();
     
-    while(--l) {
+//    __asm(".align 4");
+    while(l--) {
         *bb_gpio_port = 1;
         *bb_gpio_port = 0;
         *bb_gpio_port = 1;

diff -r ab159002ec37 -r 02a561139720 mbed.bld
--- a/mbed.bld	Mon Jan 26 10:31:24 2015 +0000
+++ b/mbed.bld	Thu Sep 07 14:53:32 2017 +0000
@@ -1,1 +1,1 @@
-http://mbed.org/users/mbed_official/code/mbed/builds/4fc01daae5a5
\ No newline at end of file
+https://mbed.org/users/mbed_official/code/mbed/builds/a330f0fddbec
\ No newline at end of file