1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
|
/*
* This software is experimental and a work in progress.
* Under no circumstances should these files be used in relation to any critical system(s).
* Use of these files is at your own risk.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
* PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
* This files are free to use from https://github.com/rogerclarkmelbourne/Arduino_STM32 and
* https://github.com/leaflabs/libmaple
*
* Modifications for QMK and STM32F303 by Yiancar
*/
#if defined(EEPROM_EMU_STM32F303xC)
#define STM32F303xC
#include "stm32f3xx.h"
#elif defined(EEPROM_EMU_STM32F103xB)
#define STM32F103xB
#include "stm32f1xx.h"
#else
#error "not implemented."
#endif
#include "flash_stm32.h"
#if defined(EEPROM_EMU_STM32F103xB)
#define FLASH_SR_WRPERR FLASH_SR_WRPRTERR
#endif
/* Delay definition */
#define EraseTimeout ((uint32_t)0x00000FFF)
#define ProgramTimeout ((uint32_t)0x0000001F)
#define ASSERT(exp) (void)((0))
/**
* @brief Inserts a time delay.
* @param None
* @retval None
*/
static void delay(void)
{
__IO uint32_t i = 0;
for(i = 0xFF; i != 0; i--) { }
}
/**
* @brief Returns the FLASH Status.
* @param None
* @retval FLASH Status: The returned value can be: FLASH_BUSY, FLASH_ERROR_PG,
* FLASH_ERROR_WRP or FLASH_COMPLETE
*/
FLASH_Status FLASH_GetStatus(void)
{
if ((FLASH->SR & FLASH_SR_BSY) == FLASH_SR_BSY)
return FLASH_BUSY;
if ((FLASH->SR & FLASH_SR_PGERR) != 0)
return FLASH_ERROR_PG;
if ((FLASH->SR & FLASH_SR_WRPERR) != 0 )
return FLASH_ERROR_WRP;
if ((FLASH->SR & FLASH_OBR_OPTERR) != 0 )
return FLASH_ERROR_OPT;
return FLASH_COMPLETE;
}
/**
* @brief Waits for a Flash operation to complete or a TIMEOUT to occur.
* @param Timeout: FLASH progamming Timeout
* @retval FLASH Status: The returned value can be: FLASH_ERROR_PG,
* FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT.
*/
FLASH_Status FLASH_WaitForLastOperation(uint32_t Timeout)
{
FLASH_Status status;
/* Check for the Flash Status */
status = FLASH_GetStatus();
/* Wait for a Flash operation to complete or a TIMEOUT to occur */
while ((status == FLASH_BUSY) && (Timeout != 0x00))
{
delay();
status = FLASH_GetStatus();
Timeout--;
}
if (Timeout == 0)
status = FLASH_TIMEOUT;
/* Return the operation status */
return status;
}
/**
* @brief Erases a specified FLASH page.
* @param Page_Address: The page address to be erased.
* @retval FLASH Status: The returned value can be: FLASH_BUSY, FLASH_ERROR_PG,
* FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT.
*/
FLASH_Status FLASH_ErasePage(uint32_t Page_Address)
{
FLASH_Status status = FLASH_COMPLETE;
/* Check the parameters */
ASSERT(IS_FLASH_ADDRESS(Page_Address));
/* Wait for last operation to be completed */
status = FLASH_WaitForLastOperation(EraseTimeout);
if(status == FLASH_COMPLETE)
{
/* if the previous operation is completed, proceed to erase the page */
FLASH->CR |= FLASH_CR_PER;
FLASH->AR = Page_Address;
FLASH->CR |= FLASH_CR_STRT;
/* Wait for last operation to be completed */
status = FLASH_WaitForLastOperation(EraseTimeout);
if(status != FLASH_TIMEOUT)
{
/* if the erase operation is completed, disable the PER Bit */
FLASH->CR &= ~FLASH_CR_PER;
}
FLASH->SR = (FLASH_SR_EOP | FLASH_SR_PGERR | FLASH_SR_WRPERR);
}
/* Return the Erase Status */
return status;
}
/**
* @brief Programs a half word at a specified address.
* @param Address: specifies the address to be programmed.
* @param Data: specifies the data to be programmed.
* @retval FLASH Status: The returned value can be: FLASH_ERROR_PG,
* FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT.
*/
FLASH_Status FLASH_ProgramHalfWord(uint32_t Address, uint16_t Data)
{
FLASH_Status status = FLASH_BAD_ADDRESS;
if (IS_FLASH_ADDRESS(Address))
{
/* Wait for last operation to be completed */
status = FLASH_WaitForLastOperation(ProgramTimeout);
if(status == FLASH_COMPLETE)
{
/* if the previous operation is completed, proceed to program the new data */
FLASH->CR |= FLASH_CR_PG;
*(__IO uint16_t*)Address = Data;
/* Wait for last operation to be completed */
status = FLASH_WaitForLastOperation(ProgramTimeout);
if(status != FLASH_TIMEOUT)
{
/* if the program operation is completed, disable the PG Bit */
FLASH->CR &= ~FLASH_CR_PG;
}
FLASH->SR = (FLASH_SR_EOP | FLASH_SR_PGERR | FLASH_SR_WRPERR);
}
}
return status;
}
/**
* @brief Unlocks the FLASH Program Erase Controller.
* @param None
* @retval None
*/
void FLASH_Unlock(void)
{
/* Authorize the FPEC Access */
FLASH->KEYR = FLASH_KEY1;
FLASH->KEYR = FLASH_KEY2;
}
/**
* @brief Locks the FLASH Program Erase Controller.
* @param None
* @retval None
*/
void FLASH_Lock(void)
{
/* Set the Lock Bit to lock the FPEC and the FCR */
FLASH->CR |= FLASH_CR_LOCK;
}
/**
* @brief Clears the FLASH's pending flags.
* @param FLASH_FLAG: specifies the FLASH flags to clear.
* This parameter can be any combination of the following values:
* @arg FLASH_FLAG_PGERR: FLASH Programming error flag flag
* @arg FLASH_FLAG_WRPERR: FLASH Write protected error flag
* @arg FLASH_FLAG_EOP: FLASH End of Programming flag
* @retval None
*/
void FLASH_ClearFlag(uint32_t FLASH_FLAG)
{
/* Clear the flags */
FLASH->SR = FLASH_FLAG;
}
|
