made this shitty clock work

numworks_port/README.md

@@ -13,13 +13,11 @@ This is a bare metal os attempt on the numworks n0110
 - [x] Working thing
 - [x] Led interface
 - [x] Keyboard interface
-- [ ] Set clock and all
-    - [ ] adapt ms_wait() and us_wait()
+- [x] Set clock and all
+    - [x] adapt ms_wait() and us_wait()
 - [ ] Screen interface
 - [ ] UI toolkit
     - [ ] set pixel
     - [ ] text display
     - [ ] fill rect
     - [ ] image display
-- [ ] File system
-    - [ ] Plan what to do

numworks_port/src/Laplace/clock.c

@@ -54,8 +54,32 @@ void init_clock(){
      * wait a little bit.
      * The spec tells us that at 2.8V and over 210MHz the flash expects 7 WS. */
     // clear in first place
-    FLASH->ACR &= ~(0b0000 0000 0000 0000
-                      0000 0011 0000 1111);
+    FLASH->ACR &= ~(FLASH_ACR_LATENCY_Msk | FLASH_ACR_PRFTEN | FLASH_ACR_ARTEN);
+    FLASH->ACR |= (FLASH_ACR_LATENCY_7WS | FLASH_ACR_PRFTEN | FLASH_ACR_ARTEN);
+
+    // 192MHz is too fast for both APB1 and APB2 so we divide them 
+    // firstly we clear
+    RCC->CFGR &= ~(0b00000000000000001111110000000000);
+    /* Then we set
+     * PPRE1 = 4 = 100
+     * PPRE2 = 2 = 10 */
+    RCC->CFGR |= 0b00000000000000001001010000000000;
+
+    // We now wait for PLLRDY
+    while (!(RCC->CR & RCC_CR_PLLRDY)) {};
+
+    // We select PLL output as a SYSCLK source
+    RCC->CFGR |= RCC_CFGR_SW_PLL;
+    // And wait for it !!!
+    while ((RCC->CFGR & RCC_CFGR_SWS_Msk) != RCC_CFGR_SWS_PLL) {};
+
+    // We can now disable HSI
+    RCC->CR &= ~(RCC_CR_HSION);
+
+    // Set normal speed
+    RCC->CFGR &= ~(RCC_CFGR_HPRE_Msk);
+
+    set_led_green(true);
 }
 
 /* OLD

numworks_port/src/Laplace/clock.h

@@ -9,11 +9,7 @@
 
 #include "stdint.h"
 #include "../device/stm32f730xx.h"
-
-#define PLL_N 384
-#define PLL_M 8
-#define PLL_P 2
-#define PLL_Q 8
+#include "led.h"
 
 /*
 RCC->PLLCFGR  |=  0b00001000010000100110000000001000; // HSE: 8MHz*/

numworks_port/src/Laplace/time.h

@@ -8,7 +8,7 @@
 #define TIME_H
 
 #define loops_per_microsecond 1
-#define loops_per_millisecond 960
+#define loops_per_millisecond 12000
 
 #include "stdint.h"
 

numworks_port/src/main.c

@@ -33,9 +33,9 @@ void main_entry(){
             set_led_red(false);
         }*/
 
-        set_led_red(true);
+        set_led_blue(true);
         ms_wait(5000);
-        set_led_red(false);
+        set_led_blue(false);
         ms_wait(5000);
     }