SWM320 和 SWM34S 的 micropython 移植。。

XIVN1987

源码：https://gitee.com/synwit-co-ltd/micropython

User Guide 中有每个外设的使用示例代码。。

读写 SPI FLash 示例代码：

1. import machine, time
   
2. from machine import Pin, SPI
   
3. from array import array
   
4. 
   
5. spi = machine.SPI(1, 1000000, mosi='PC4', miso='PC5', sck='PC3')
   
6. spi_ss = machine.Pin('PC6', Pin.OUT)
   
7. spi_ss.high()
   
8. 
   
9. GD25Q21_CMD_READ_CHIPID   = 0x90
   
10. GD25Q21_CMD_READ_DATA     = 0x03
    
11. GD25Q21_CMD_WRITE_PAGE    = 0x02
    
12. GD25Q21_CMD_ERASE_SECTOR  = 0x20
    
13. GD25Q21_CMD_WRITE_ENABLE  = 0x06
    
14. GD25Q21_CMD_WRITE_DISABLE = 0x04
    
15. 
    
16. def flash_identify():
    
17.     spi_ss.low()
    
18.     spi.write(array('B', [GD25Q21_CMD_READ_CHIPID,  0x00, 0x00, 0x00]))
    
19.     memview = spi.read(2)
    
20.     spi_ss.high()
    
21. 
    
22.     return array('B', memview)
    
23. 
    
24. def flash_erase(addr):
    
25.     spi_ss.low()
    
26.     spi.write(array('B', [GD25Q21_CMD_WRITE_ENABLE]))
    
27.     spi_ss.high()
    
28. 
    
29.     spi_ss.low()
    
30.     spi.write(array('B', [GD25Q21_CMD_ERASE_SECTOR, (addr >> 16) & 0xFF, (addr >>  8) & 0xFF, (addr >>  0) & 0xFF]))
    
31.     spi_ss.high()
    
32. 
    
33. def flash_write(addr, buf):
    
34.     spi_ss.low()
    
35.     spi.write(array('B', [GD25Q21_CMD_WRITE_ENABLE]))
    
36.     spi_ss.high()
    
37. 
    
38.     spi_ss.low()
    
39.     spi.write(array('B', [GD25Q21_CMD_WRITE_PAGE,   (addr >> 16) & 0xFF, (addr >>  8) & 0xFF, (addr >>  0) & 0xFF]))
    
40.     spi.write(buf)
    
41.     spi_ss.high()
    
42. 
    
43. def flash_read(addr, cnt):
    
44.     spi_ss.low()
    
45.     spi.write(array('B', [GD25Q21_CMD_READ_DATA,    (addr >> 16) & 0xFF, (addr >>  8) & 0xFF, (addr >>  0) & 0xFF]))
    
46.     memview = spi.read(cnt)
    
47.     spi_ss.high()
    
48. 
    
49.     return array('B', memview)
    
50. 
    
51. flash_identify()
    
52. flash_erase(0x1000)
    
53. time.sleep(2)
    
54. flash_read(0x1000, 32)
    
55. flash_write(0x1000, array('B', [i for i in range(32)]))
    
56. time.sleep(1)
    
57. flash_read(0x1000, 32)

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