SPI sends and receives data in asynchronous mode
Function Overview
The demo project will do the following two things
Initialize SPI master
Call SPI master asynchronous transceiver interface，transmit 256byte data，and receive 256 byte at the same time
Environmental Requirements
The slave device and spi master pins must be connected in advance
Start the slave end in advance, wait for receiving and prepare the data to be sent
PIN_CS: GPIO20, PIN_CLK: GPIO17, PIN_MISO: GPIO16, PIN_MOSI:GPIO21, mode 0, clock: 2MHz
Compile and Download
demo project path：examples/peripheral/spi_master/transceive_sync
For compilation, flashing, and other operations, please refer to: Quick Start Guide
Running Result
The following log is displayed after successful operation
D/dt [0.002] add device iflash
D/ptb [0.002] partition table base 0xe000
D/ft [0.002] ft_0 base 0, ft_1 base 1000
D/ft [0.002] ft init too
D/ft [0.004] ft init 1
D/main [0.004] boot reason 0
D/main [0.004] heap size 273152(266.75KB)
D/main [0.004] flash size 0x200000(2MB)
spi master async transecie start.
D/dt [0.038] add device senter example_spim_aysnc_callback, result:0
pi
rx data as below
[0]00 [1]00 [2]00 [3]00 [4]00 [5]00 [6]00 [7]00 [8]00 [9]00 [10]00 [11]00 [12]00 [13]00 [14]00 [15]00
[16]00 [17]00 [18]00 [19]00 [20]00 [21]00 [22]00 [23]00 [24]00 [25]00 [26]00 [27]00 [28]00 [29]00 [30]00 [31]00
[32]00 [33]00 [34]00 [35]00 [36]00 [37]00 [38]00 [39]00 [40]00 [41]00 [42]00 [43]00 [44]00 [45]00 [46]00 [47]00
[48]00 [49]00 [50]00 [51]00 [52]00 [53]00 [54]00 [55]00 [56]00 [57]00 [58]00 [59]00 [60]00 [61]00 [62]00 [63]00
[64]00 [65]00 [66]00 [67]00 [68]00 [69]00 [70]00 [71]00 [72]00 [73]00 [74]00 [75]00 [76]00 [77]00 [78]00 [79]00
[80]00 [81]00 [82]00 [83]00 [84]00 [85]00 [86]00 [87]00 [88]00 [89]00 [90]00 [91]00 [92]00 [93]00 [94]00 [95]00
[96]00 [97]00 [98]00 [99]00 [100]00 [101]00 [102]00 [103]00 [104]00 [105]00 [106]00 [107]00 [108]00 [109]00 [110]00 [111]00
[112]00 [113]00 [114]00 [115]00 [116]00 [117]00 [118]00 [119]00 [120]00 [121]00 [122]00 [123]00 [124]00 [125]00 [126]00 [127]00
[128]00 [129]00 [130]00 [131]00 [132]00 [133]00 [134]00 [135]00 [136]00 [137]00 [138]00 [139]00 [140]00 [141]00 [142]00 [143]00
[144]00 [145]00 [146]00 [147]00 [148]00 [149]00 [150]00 [151]00 [152]00 [153]00 [154]00 [155]00 [156]00 [157]00 [158]00 [159]00
[160]00 [161]00 [162]00 [163]00 [164]00 [165]00 [166]00 [167]00 [168]00 [169]00 [170]00 [171]00 [172]00 [173]00 [174]00 [175]00
[176]00 [177]00 [178]00 [179]00 [180]00 [181]00 [182]00 [183]00 [184]00 [185]00 [186]00 [187]00 [188]00 [189]00 [190]00 [191]00
[192]00 [193]00 [194]00 [195]00 [196]00 [197]00 [198]00 [199]00 [200]00 [201]00 [202]00 [203]00 [204]00 [205]00 [206]00 [207]00
[208]00 [209]00 [210]00 [211]00 [212]00 [213]00 [214]00 [215]00 [216]00 [217]00 [218]00 [219]00 [220]00 [221]00 [222]00 [223]00
[224]00 [225]00 [226]00 [227]00 [228]00 [229]00 [230]00 [231]00 [232]00 [233]00 [234]00 [235]00 [236]00 [237]00 [238]00 [239]00
[240]00 [241]00 [242]00 [243]00 [244]00 [245]00 [246]00 [247]00 [248]00 [249]00 [250]00 [251]00 [252]00 [253]00 [254]00 [255]00