ESP8266 #12
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I have a lot of knowledge about ARM Cortex-M architecture. I briefly studied MIPS (PIC) and Xtensa (ESP8266, ESP32), however, my knowledge about the latter two is negligible compared to Cortex-M. I like Cortex-M architecture. It's very elegant comparing to both mentioned, especially its way of handling interrupts and events. There are to much to do in the world of ARM MCUs for one person like me and I probably won't be able to deal with other architectures. Help is need... |
dongkc
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May 23, 2022
func main() { panic("foo"); } with previous (union based) definition of interface and type casting:
20000040: b580 push {r7, lr}
20000042: 2300 movs r3, #0
20000044: b08c sub sp, #48 ; 0x30
20000046: e9cd 3308 strd r3, r3, [sp, #32]
2000004a: 2603 movs r6, ziutek#3
2000004c: 4f0c ldr r7, [pc, #48] ; (20000080 <main$main+0x40>)
2000004e: 9706 str r7, [sp, ziutek#24]
20000050: 9607 str r6, [sp, #28]
20000052: ac06 add r4, sp, ziutek#24
20000054: e894 000f ldmia.w r4, {r0, r1, r2, r3}
20000058: ad02 add r5, sp, ziutek#8
2000005a: e885 000f stmia.w r5, {r0, r1, r2, r3}
2000005e: 9603 str r6, [sp, ziutek#12]
20000060: e895 000f ldmia.w r5, {r0, r1, r2, r3}
20000064: e884 000f stmia.w r4, {r0, r1, r2, r3}
20000068: ab0c add r3, sp, #48 ; 0x30
2000006a: 4a06 ldr r2, [pc, ziutek#24] ; (20000084 <main$main+0x44>)
2000006c: f843 2d08 str.w r2, [r3, #-8]!
20000070: e893 0003 ldmia.w r3, {r0, r1}
20000074: e88d 0003 stmia.w sp, {r0, r1}
20000078: e894 000f ldmia.w r4, {r0, r1, r2, r3}
2000007c: f000 f896 bl 200001ac <panic>
20000080: 20001c20 .word 0x20001c20
20000084: 20001bb4 .word 0x20001bb4
func main() { panic("foo"); } with new interface and type casting:
20000040: b500 push {lr}
20000042: 2300 movs r3, #0
20000044: b08d sub sp, #52 ; 0x34
20000046: e9cd 3304 strd r3, r3, [sp, ziutek#16]
2000004a: 4b0a ldr r3, [pc, #40] ; (20000074 <main$main+0x34>)
2000004c: 9302 str r3, [sp, ziutek#8]
2000004e: 2303 movs r3, ziutek#3
20000050: 9303 str r3, [sp, ziutek#12]
20000052: ab02 add r3, sp, ziutek#8
20000054: cb0f ldmia r3, {r0, r1, r2, r3}
20000056: ac06 add r4, sp, ziutek#24
20000058: e884 000f stmia.w r4, {r0, r1, r2, r3}
2000005c: ab0c add r3, sp, #48 ; 0x30
2000005e: 4a06 ldr r2, [pc, ziutek#24] ; (20000078 <main$main+0x38>)
20000060: f843 2d08 str.w r2, [r3, #-8]!
20000064: e893 0003 ldmia.w r3, {r0, r1}
20000068: e88d 0003 stmia.w sp, {r0, r1}
2000006c: e894 000f ldmia.w r4, {r0, r1, r2, r3}
20000070: f000 f896 bl 200001a0 <panic>
20000074: 20001bc0 .word 0x20001bc0
20000078: 20001b54 .word 0x20001b54
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Is there plans for adding support for the ESP8266 wifi chips?
It's very popular and I think it would be a great candidate for emgo!
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