use generalized libopencm3 functions in cmsis

scripts/irq2nvic_h

@@ -99,7 +99,19 @@ template_vector_nvic_c = '''\
     {vectortableinitialization}
 '''
 
-def convert(infile, outfile_nvic, outfile_vectornvic):
+template_cmsis_h = '''\
+/* This file is part of the libopencm3 project.
+ *
+ * It was generated by the irq2nvic_h script.
+ *
+ * These definitions bend every interrupt handler that is defined CMSIS style
+ * to the weak symbol exported by libopenmc3.
+ */
+
+{cmsisbends}
+'''
+
+def convert(infile, outfile_nvic, outfile_vectornvic, outfile_cmsis):
     data = yaml.load(infile)
 
     irq2name = list(enumerate(data['irqs']) if isinstance(data['irqs'], list) else data['irqs'].items())
@@ -114,9 +126,11 @@ def convert(infile, outfile_nvic, outfile_vectornvic):
     data['isrprototypes'] = "\n".join('void WEAK %s_isr(void);'%name.lower() for name in irqnames)
     data['isrpragmas'] = "\n".join('#pragma weak %s_isr = blocking_handler'%name.lower() for name in irqnames)
     data['vectortableinitialization'] = ', \\\n    '.join('[NVIC_%s_IRQ] = %s_isr'%(name.upper(), name.lower()) for name in irqnames)
+    data['cmsisbends'] = "\n".join("#define %s_IRQHandler %s_isr"%(name.upper(), name.lower()) for name in irqnames)
 
     outfile_nvic.write(template_nvic_h.format(**data))
     outfile_vectornvic.write(template_vector_nvic_c.format(**data))
+    outfile_cmsis.write(template_cmsis_h.format(**data))
 
 def makeparentdir(filename):
     try:
@@ -131,11 +145,13 @@ def main():
         raise ValueError("Arguent must match ./include/libopencm3/**/irq.yaml")
     nvic_h = infile.replace('irq.yaml', 'nvic.h')
     vector_nvic_c = infile.replace('./include/libopencm3/', './lib/').replace('irq.yaml', 'vector_nvic.c')
+    cmsis = infile.replace('irq.yaml', 'irqhandlers.h').replace('/libopencm3/', '/libopencmsis/')
 
     makeparentdir(nvic_h)
     makeparentdir(vector_nvic_c)
+    makeparentdir(cmsis)
 
-    convert(open(infile), open(nvic_h, 'w'), open(vector_nvic_c, 'w'))
+    convert(open(infile), open(nvic_h, 'w'), open(vector_nvic_c, 'w'), open(cmsis, 'w'))
 
 if __name__ == "__main__":
     main()